code: def _get_first_error_start_pos_or_none(module):
      error_leaf = _check_error_leaves_nodes(module)
      return None if error_leaf is None else error_leaf.start_pos
  
imports: from __future__ import print_function
  import logging
  import sys
  import os
  import random
  import pickle
  import parso
  from parso.utils import split_lines
  from test.test_diff_parser import _check_error_leaves_nodes
label_desc: Use image node_id 3 for calling a global function with example usage: _get_first_error_start_pos_or_none(module) and returns: unknown