Function RegisterOp

tensorflow/core/framework/function.cc:1815–1819

}

bool RegisterOp(const string& op, Creator func) {
  CHECK(GetOpGradFactory()->insert({op, func}).second)
      << "Duplicated gradient for " << op;
  return true;
}

Status GetOpGradientCreator(const string& op, Creator* creator) {
  auto fac = GetOpGradFactory();