sig_def_builder.add_inputs(inputs_buf);
    sig_def_builder.add_outputs(outputs_buf);
    sig_def_builder.add_signature_key(signature_key_buf);
    sig_def_builder.add_subgraph_index(signature_def_data.subgraph_index);
    signature_defs_buffer.push_back(sig_def_builder.Finish());
    ++subgraph_index;
  }

  return builder_.CreateVector(signature_defs_buffer);
}

  }
  void add_signature_key(::flatbuffers::Offset<::flatbuffers::String> signature_key) {
    fbb_.AddOffset(SignatureDef::VT_SIGNATURE_KEY, signature_key);
  }
  void add_subgraph_index(uint32_t subgraph_index) {
    fbb_.AddElement<uint32_t>(SignatureDef::VT_SUBGRAPH_INDEX, subgraph_index, 0);
  }
  explicit SignatureDefBuilder(::flatbuffers::FlatBufferBuilder &_fbb)
        : fbb_(_fbb) {