code: def _run(self, mat, axis=None, split=None):  # type: ignore
      return self.common_run(mat, split, axis=axis, num_outputs=None)
  
file_path: onnx/onnx/reference/ops/op_split.py
imports: from onnx.reference.op_run import OpRun
label_desc: Use image node_id 1 for calling the Split_2 obj's underlying member method code with example usage: obj._run(mat, axis, split) and returns: self