code: def triu(g: jit_utils.GraphContext, self, diagonal, out=None):
      return g.op("Trilu", self, diagonal, upper_i=1)
  
file_path: pytorch/torch/onnx/symbolic_opset14.py
imports: from __future__ import annotations
  import functools
  from typing import Optional
  import torch
  from torch.onnx import _constants, _type_utils, symbolic_helper
  from torch.onnx._globals import GLOBALS
  from torch.onnx._internal import _beartype, jit_utils, registration
label_desc: Use image node_id 3 for calling a global function with example usage: triu(g, diagonal, out) and returns: g