Package com.google.devtools.clouddebugger.v2

Class Variable.Builder

  • All Implemented Interfaces:
    VariableOrBuilder, com.google.protobuf.Message.Builder, com.google.protobuf.MessageLite.Builder, com.google.protobuf.MessageLiteOrBuilder, com.google.protobuf.MessageOrBuilder, Cloneable
    Enclosing class:
    Variable
    public static final class Variable.Builder
extends com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>
implements VariableOrBuilder
     Represents a variable or an argument possibly of a compound object type.
 Note how the following variables are represented:

 1) A simple variable:

     int x = 5

     { name: "x", value: "5", type: "int" }  // Captured variable

 2) A compound object:

     struct T {
         int m1;
         int m2;
     };
     T x = { 3, 7 };

     {  // Captured variable
         name: "x",
         type: "T",
         members { name: "m1", value: "3", type: "int" },
         members { name: "m2", value: "7", type: "int" }
     }

 3) A pointer where the pointee was captured:

     T x = { 3, 7 };
     T* p = &x;

     {   // Captured variable
         name: "p",
         type: "T*",
         value: "0x00500500",
         members { name: "m1", value: "3", type: "int" },
         members { name: "m2", value: "7", type: "int" }
     }

 4) A pointer where the pointee was not captured:

     T* p = new T;

     {   // Captured variable
         name: "p",
         type: "T*",
         value: "0x00400400"
         status { is_error: true, description { format: "unavailable" } }
     }

 The status should describe the reason for the missing value,
 such as `<optimized out>`, `<inaccessible>`, `<pointers limit reached>`.

 Note that a null pointer should not have members.

 5) An unnamed value:

     int* p = new int(7);

     {   // Captured variable
         name: "p",
         value: "0x00500500",
         type: "int*",
         members { value: "7", type: "int" } }

 6) An unnamed pointer where the pointee was not captured:

     int* p = new int(7);
     int** pp = &p;

     {  // Captured variable
         name: "pp",
         value: "0x00500500",
         type: "int**",
         members {
             value: "0x00400400",
             type: "int*"
             status {
                 is_error: true,
                 description: { format: "unavailable" } }
             }
         }
     }

 To optimize computation, memory and network traffic, variables that
 repeat in the output multiple times can be stored once in a shared
 variable table and be referenced using the `var_table_index` field.  The
 variables stored in the shared table are nameless and are essentially
 a partition of the complete variable. To reconstruct the complete
 variable, merge the referencing variable with the referenced variable.

 When using the shared variable table, the following variables:

     T x = { 3, 7 };
     T* p = &x;
     T& r = x;

     { name: "x", var_table_index: 3, type: "T" }  // Captured variables
     { name: "p", value "0x00500500", type="T*", var_table_index: 3 }
     { name: "r", type="T&", var_table_index: 3 }

     {  // Shared variable table entry #3:
         members { name: "m1", value: "3", type: "int" },
         members { name: "m2", value: "7", type: "int" }
     }

 Note that the pointer address is stored with the referencing variable
 and not with the referenced variable. This allows the referenced variable
 to be shared between pointers and references.

 The type field is optional. The debugger agent may or may not support it.
    Protobuf type google.devtools.clouddebugger.v2.Variable

    • Method Detail

      • getDescriptor

        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor()

      • internalGetFieldAccessorTable

        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable internalGetFieldAccessorTable()
        Specified by:
        internalGetFieldAccessorTable in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • clear

        public Variable.Builder clear()
        Specified by:
        clear in interface com.google.protobuf.Message.Builder
        Specified by:
        clear in interface com.google.protobuf.MessageLite.Builder
        Overrides:
        clear in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • getDescriptorForType

        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType()
        Specified by:
        getDescriptorForType in interface com.google.protobuf.Message.Builder
        Specified by:
        getDescriptorForType in interface com.google.protobuf.MessageOrBuilder
        Overrides:
        getDescriptorForType in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • getDefaultInstanceForType

        public Variable getDefaultInstanceForType()
        Specified by:
        getDefaultInstanceForType in interface com.google.protobuf.MessageLiteOrBuilder
        Specified by:
        getDefaultInstanceForType in interface com.google.protobuf.MessageOrBuilder

      • build

        public Variable build()
        Specified by:
        build in interface com.google.protobuf.Message.Builder
        Specified by:
        build in interface com.google.protobuf.MessageLite.Builder

      • buildPartial

        public Variable buildPartial()
        Specified by:
        buildPartial in interface com.google.protobuf.Message.Builder
        Specified by:
        buildPartial in interface com.google.protobuf.MessageLite.Builder

      • clone

        public Variable.Builder clone()
        Specified by:
        clone in interface com.google.protobuf.Message.Builder
        Specified by:
        clone in interface com.google.protobuf.MessageLite.Builder
        Overrides:
        clone in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • setField

        public Variable.Builder setField​(com.google.protobuf.Descriptors.FieldDescriptor field,
                                 Object value)
        Specified by:
        setField in interface com.google.protobuf.Message.Builder
        Overrides:
        setField in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • clearField

        public Variable.Builder clearField​(com.google.protobuf.Descriptors.FieldDescriptor field)
        Specified by:
        clearField in interface com.google.protobuf.Message.Builder
        Overrides:
        clearField in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • clearOneof

        public Variable.Builder clearOneof​(com.google.protobuf.Descriptors.OneofDescriptor oneof)
        Specified by:
        clearOneof in interface com.google.protobuf.Message.Builder
        Overrides:
        clearOneof in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • setRepeatedField

        public Variable.Builder setRepeatedField​(com.google.protobuf.Descriptors.FieldDescriptor field,
                                         int index,
                                         Object value)
        Specified by:
        setRepeatedField in interface com.google.protobuf.Message.Builder
        Overrides:
        setRepeatedField in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • addRepeatedField

        public Variable.Builder addRepeatedField​(com.google.protobuf.Descriptors.FieldDescriptor field,
                                         Object value)
        Specified by:
        addRepeatedField in interface com.google.protobuf.Message.Builder
        Overrides:
        addRepeatedField in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • mergeFrom

        public Variable.Builder mergeFrom​(com.google.protobuf.Message other)
        Specified by:
        mergeFrom in interface com.google.protobuf.Message.Builder
        Overrides:
        mergeFrom in class com.google.protobuf.AbstractMessage.Builder<Variable.Builder>

      • isInitialized

        public final boolean isInitialized()
        Specified by:
        isInitialized in interface com.google.protobuf.MessageLiteOrBuilder
        Overrides:
        isInitialized in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • mergeFrom

        public Variable.Builder mergeFrom​(com.google.protobuf.CodedInputStream input,
                                  com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                           throws IOException
        Specified by:
        mergeFrom in interface com.google.protobuf.Message.Builder
        Specified by:
        mergeFrom in interface com.google.protobuf.MessageLite.Builder
        Overrides:
        mergeFrom in class com.google.protobuf.AbstractMessage.Builder<Variable.Builder>
        Throws:
        IOException

      • getName

        public String getName()
         Name of the variable, if any.
        string name = 1;
        Specified by:
        getName in interface VariableOrBuilder
        Returns:
        The name.

      • getNameBytes

        public com.google.protobuf.ByteString getNameBytes()
         Name of the variable, if any.
        string name = 1;
        Specified by:
        getNameBytes in interface VariableOrBuilder
        Returns:
        The bytes for name.

      • setName

        public Variable.Builder setName​(String value)
         Name of the variable, if any.
        string name = 1;
        Parameters:
        value - The name to set.
        Returns:
        This builder for chaining.

      • clearName

        public Variable.Builder clearName()
         Name of the variable, if any.
        string name = 1;
        Returns:
        This builder for chaining.

      • setNameBytes

        public Variable.Builder setNameBytes​(com.google.protobuf.ByteString value)
         Name of the variable, if any.
        string name = 1;
        Parameters:
        value - The bytes for name to set.
        Returns:
        This builder for chaining.

      • getValue

        public String getValue()
         Simple value of the variable.
        string value = 2;
        Specified by:
        getValue in interface VariableOrBuilder
        Returns:
        The value.

      • getValueBytes

        public com.google.protobuf.ByteString getValueBytes()
         Simple value of the variable.
        string value = 2;
        Specified by:
        getValueBytes in interface VariableOrBuilder
        Returns:
        The bytes for value.

      • setValue

        public Variable.Builder setValue​(String value)
         Simple value of the variable.
        string value = 2;
        Parameters:
        value - The value to set.
        Returns:
        This builder for chaining.

      • clearValue

        public Variable.Builder clearValue()
         Simple value of the variable.
        string value = 2;
        Returns:
        This builder for chaining.

      • setValueBytes

        public Variable.Builder setValueBytes​(com.google.protobuf.ByteString value)
         Simple value of the variable.
        string value = 2;
        Parameters:
        value - The bytes for value to set.
        Returns:
        This builder for chaining.

      • getType

        public String getType()
         Variable type (e.g. `MyClass`). If the variable is split with
 `var_table_index`, `type` goes next to `value`. The interpretation of
 a type is agent specific. It is recommended to include the dynamic type
 rather than a static type of an object.
        string type = 6;
        Specified by:
        getType in interface VariableOrBuilder
        Returns:
        The type.

      • getTypeBytes

        public com.google.protobuf.ByteString getTypeBytes()
         Variable type (e.g. `MyClass`). If the variable is split with
 `var_table_index`, `type` goes next to `value`. The interpretation of
 a type is agent specific. It is recommended to include the dynamic type
 rather than a static type of an object.
        string type = 6;
        Specified by:
        getTypeBytes in interface VariableOrBuilder
        Returns:
        The bytes for type.

      • setType

        public Variable.Builder setType​(String value)
         Variable type (e.g. `MyClass`). If the variable is split with
 `var_table_index`, `type` goes next to `value`. The interpretation of
 a type is agent specific. It is recommended to include the dynamic type
 rather than a static type of an object.
        string type = 6;
        Parameters:
        value - The type to set.
        Returns:
        This builder for chaining.

      • clearType

        public Variable.Builder clearType()
         Variable type (e.g. `MyClass`). If the variable is split with
 `var_table_index`, `type` goes next to `value`. The interpretation of
 a type is agent specific. It is recommended to include the dynamic type
 rather than a static type of an object.
        string type = 6;
        Returns:
        This builder for chaining.

      • setTypeBytes

        public Variable.Builder setTypeBytes​(com.google.protobuf.ByteString value)
         Variable type (e.g. `MyClass`). If the variable is split with
 `var_table_index`, `type` goes next to `value`. The interpretation of
 a type is agent specific. It is recommended to include the dynamic type
 rather than a static type of an object.
        string type = 6;
        Parameters:
        value - The bytes for type to set.
        Returns:
        This builder for chaining.

      • getMembersList

        public List<Variable> getMembersList()
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;
        Specified by:
        getMembersList in interface VariableOrBuilder

      • getMembersCount

        public int getMembersCount()
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;
        Specified by:
        getMembersCount in interface VariableOrBuilder

      • getMembers

        public Variable getMembers​(int index)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;
        Specified by:
        getMembers in interface VariableOrBuilder

      • setMembers

        public Variable.Builder setMembers​(int index,
                                   Variable value)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • setMembers

        public Variable.Builder setMembers​(int index,
                                   Variable.Builder builderForValue)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembers

        public Variable.Builder addMembers​(Variable value)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembers

        public Variable.Builder addMembers​(int index,
                                   Variable value)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembers

        public Variable.Builder addMembers​(Variable.Builder builderForValue)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembers

        public Variable.Builder addMembers​(int index,
                                   Variable.Builder builderForValue)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addAllMembers

        public Variable.Builder addAllMembers​(Iterable<? extends Variable> values)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • clearMembers

        public Variable.Builder clearMembers()
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • removeMembers

        public Variable.Builder removeMembers​(int index)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • getMembersBuilder

        public Variable.Builder getMembersBuilder​(int index)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembersBuilder

        public Variable.Builder addMembersBuilder()
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • addMembersBuilder

        public Variable.Builder addMembersBuilder​(int index)
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • getMembersBuilderList

        public List<Variable.Builder> getMembersBuilderList()
         Members contained or pointed to by the variable.
        repeated .google.devtools.clouddebugger.v2.Variable members = 3;

      • hasVarTableIndex

        public boolean hasVarTableIndex()
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;
        Specified by:
        hasVarTableIndex in interface VariableOrBuilder
        Returns:
        Whether the varTableIndex field is set.

      • getVarTableIndex

        public com.google.protobuf.Int32Value getVarTableIndex()
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;
        Specified by:
        getVarTableIndex in interface VariableOrBuilder
        Returns:
        The varTableIndex.

      • setVarTableIndex

        public Variable.Builder setVarTableIndex​(com.google.protobuf.Int32Value value)
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;

      • setVarTableIndex

        public Variable.Builder setVarTableIndex​(com.google.protobuf.Int32Value.Builder builderForValue)
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;

      • mergeVarTableIndex

        public Variable.Builder mergeVarTableIndex​(com.google.protobuf.Int32Value value)
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;

      • clearVarTableIndex

        public Variable.Builder clearVarTableIndex()
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;

      • getVarTableIndexBuilder

        public com.google.protobuf.Int32Value.Builder getVarTableIndexBuilder()
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;

      • getVarTableIndexOrBuilder

        public com.google.protobuf.Int32ValueOrBuilder getVarTableIndexOrBuilder()
         Reference to a variable in the shared variable table. More than
 one variable can reference the same variable in the table. The
 `var_table_index` field is an index into `variable_table` in Breakpoint.
        .google.protobuf.Int32Value var_table_index = 4;
        Specified by:
        getVarTableIndexOrBuilder in interface VariableOrBuilder

      • hasStatus

        public boolean hasStatus()
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;
        Specified by:
        hasStatus in interface VariableOrBuilder
        Returns:
        Whether the status field is set.

      • getStatus

        public StatusMessage getStatus()
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;
        Specified by:
        getStatus in interface VariableOrBuilder
        Returns:
        The status.

      • setStatus

        public Variable.Builder setStatus​(StatusMessage value)
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;

      • setStatus

        public Variable.Builder setStatus​(StatusMessage.Builder builderForValue)
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;

      • mergeStatus

        public Variable.Builder mergeStatus​(StatusMessage value)
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;

      • clearStatus

        public Variable.Builder clearStatus()
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;

      • getStatusBuilder

        public StatusMessage.Builder getStatusBuilder()
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;

      • getStatusOrBuilder

        public StatusMessageOrBuilder getStatusOrBuilder()
         Status associated with the variable. This field will usually stay
 unset. A status of a single variable only applies to that variable or
 expression. The rest of breakpoint data still remains valid. Variables
 might be reported in error state even when breakpoint is not in final
 state.

 The message may refer to variable name with `refers_to` set to
 `VARIABLE_NAME`. Alternatively `refers_to` will be set to `VARIABLE_VALUE`.
 In either case variable value and members will be unset.

 Example of error message applied to name: `Invalid expression syntax`.

 Example of information message applied to value: `Not captured`.

 Examples of error message applied to value:

 *   `Malformed string`,
 *   `Field f not found in class C`
 *   `Null pointer dereference`
        .google.devtools.clouddebugger.v2.StatusMessage status = 5;
        Specified by:
        getStatusOrBuilder in interface VariableOrBuilder

      • setUnknownFields

        public final Variable.Builder setUnknownFields​(com.google.protobuf.UnknownFieldSet unknownFields)
        Specified by:
        setUnknownFields in interface com.google.protobuf.Message.Builder
        Overrides:
        setUnknownFields in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>

      • mergeUnknownFields

        public final Variable.Builder mergeUnknownFields​(com.google.protobuf.UnknownFieldSet unknownFields)
        Specified by:
        mergeUnknownFields in interface com.google.protobuf.Message.Builder
        Overrides:
        mergeUnknownFields in class com.google.protobuf.GeneratedMessageV3.Builder<Variable.Builder>