code: def leafs_(self):
      if self._leafs_ is None:
          raise RuntimeError("NgramPart was not initialized.")
      return self._leafs_
  
imports: from enum import IntEnum
  from typing import List
  import numpy
  from onnx.reference.op_run import OpRun
label_desc: Use image node_id 6 for calling the NgramPart obj's underlying member method code with example usage: obj.leafs_() and returns: self