return result;
}

// Creates the `loop_var_idx`-th Merge node of a loop being constructed with
// `scope`. `enter_output` is the `loop_var_idx`-th Enter node's output.
Status CreateMerge(const Scope& scope, int loop_var_idx,
                   const Output& enter_output, Output* merge_output) {
  // The merge nodes accept the while loop's back edges as an input (i.e. the