public Builder addFile(
          com.google.protobuf.DescriptorProtos.FileDescriptorProto.Builder builderForValue) {
        if (fileBuilder_ == null) {
          ensureFileIsMutable();
          file_.add(builderForValue.build());
          onChanged();
        } else {
          fileBuilder_.addMessage(builderForValue.build());
        }
        return this;
      }