code: def _check_tabs_spaces(self, spacing):
      if self._wrong_indentation_char in spacing.value:
          self.add_issue(
              spacing,
              101,
              "Indentation contains " + self._indentation_type,
          )
          return True
      return False
  
imports: import re
  from contextlib import contextmanager
  from parso.python.errors import ErrorFinder, ErrorFinderConfig
  from parso.normalizer import Rule
  from parso.python.tree import search_ancestor, Flow, Scope
label_desc: Use image node_id 4 for calling the PEP8Normalizer obj's underlying member method code with example usage: obj._check_tabs_spaces(spacing) and returns: False, True