code: def __init__(self, nid: int):
      self.id_ = nid  # 0 - means no entry, search for a bigger N
      self._leafs_ = None
  
imports: from enum import IntEnum
  from typing import List
  import numpy
  from onnx.reference.op_run import OpRun
label_desc: Use image node_id 1 to create a new NgramPart object  with example: obj = NgramPart(nid)