code: def _maybe_run_matchers(self, text, run_matchers):
          
  
          if run_matchers is True or \
             (run_matchers is not False and text not in self._overlayed_already):
              text.overlay(self.matchers)
              self._overlayed_already.append(text)
docs: OverlayedText should be smart enough to not run twice the same
          matchers but this is an extra handle of control over that.