code: def add_stats(self, key):
      if key in self.stats:
          self.stats[key] += 1
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import functools
  import os
  import platform
  import re
  import sys
  import time
  from datetime import datetime
  import py
  import six
  import pytest
  from _pytest import nodes
  from _pytest.config import filename_arg
label_desc: Use image node_id 4 for calling the LogXML obj's underlying member method code with example usage: obj.add_stats(key) without return types