"memory regions");

  return OkStatus();
}

// Validates the operations supplied by the plugin.
//
// Uses the 4 simpler `ValidateHelper(const TF_...*)` to validate each
// individual function table and then checks that the function table for a
// specific file type exists if the plugin offers support for creating that
// type of files.
static Status ValidateOperations(const TF_FilesystemPluginOps* ops) {

  // Define the functions
  TF_Function* func;
  TF_Function* grad_func;
  DefineFunction("FooFunc", &func);
  DefineFunction("MyGrad", &grad_func);

  // Add functions individually
  TF_GraphCopyFunction(host_graph_, func, nullptr, s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  TF_GraphCopyFunction(host_graph_, grad_func, nullptr, s_);