public Builder addValue(
          int index, com.google.protobuf.DescriptorProtos.EnumValueDescriptorProto.Builder builderForValue) {
        if (valueBuilder_ == null) {
          ensureValueIsMutable();
          value_.add(index, builderForValue.build());
          onChanged();
        } else {
          valueBuilder_.addMessage(index, builderForValue.build());
        }
        return this;
      }