public Builder clearSourceCodeInfo() {
        if (sourceCodeInfoBuilder_ == null) {
          sourceCodeInfo_ = com.google.protobuf.DescriptorProtos.SourceCodeInfo.getDefaultInstance();
          onChanged();
        } else {
          sourceCodeInfoBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000400);
        return this;
      }