void* Init(TfLiteContext* context, const char* buffer, size_t length) {
  auto* op_data = new OpData();
  op_data->kernel_type = kTfLiteLSTMBasicKernel;
  // `scratch_tensor_index` is unused in this kernel.
  op_data->scratch_tensor_index = -1;
  return op_data;
}
void* Init(TfLiteContext* context, const char* buffer, size_t length) {
  auto* op_data = new OpData();
  op_data->kernel_type = kTfLiteLSTMBasicKernel;
   
  op_data->scratch_tensor_index = -1;
  return op_data;
}