// array of each mapping's source index is returned in `src_indexes`.
//
// `*src_names`, `*src_indexes`, and the memory backing each string in
// `src_names` are owned by and have the lifetime of `results`.
TF_CAPI_EXPORT extern void TF_ImportGraphDefResultsMissingUnusedInputMappings(
    TF_ImportGraphDefResults* results, int* num_missing_unused_input_mappings,
    const char*** src_names, int** src_indexes);

  int num_unused_input_mappings;
  const char** src_names;
  int* src_indexes;
  TF_ImportGraphDefResultsMissingUnusedInputMappings(
      results, &num_unused_input_mappings, &src_names, &src_indexes);
  ASSERT_EQ(1, num_unused_input_mappings);
  EXPECT_EQ(string("fake"), string(src_names[0]));
  EXPECT_EQ(0, src_indexes[0]);

  TF_DeleteImportGraphDefResults(results);
  TF_DeleteImportGraphDefOptions(opts);

    TF_ImportGraphDefResults* results, int* num_missing_unused_input_mappings,
    const char*** src_names, int** src_indexes) {
  *num_missing_unused_input_mappings = results->missing_unused_key_names.size();
  *src_names = results->missing_unused_key_names.data();
  *src_indexes = results->missing_unused_key_indexes.data();
}

void TF_DeleteImportGraphDefResults(TF_ImportGraphDefResults* results) {