code: def aten__is_(g: jit_utils.GraphContext, self, other):
      if symbolic_helper._is_none(other):
          if isinstance(self.type(), _C.OptionalType):
              none = g.op("OptionalHasElement", self)
              return g.op("Not", none)
          else:
              return g.op("Constant", value_t=torch.BoolTensor([0]))
      return opset9.eq(g, self, other)
  
file_path: pytorch/torch/onnx/symbolic_opset15.py
imports: import functools
  import torch
  from torch import _C
  from torch.onnx import symbolic_helper, symbolic_opset9
  from torch.onnx._internal import _beartype, jit_utils, registration
label_desc: Use image node_id 1 for calling a global function with example usage: aten__is_(g, other) and returns: opset9, g, g