code: def get_string_counter(fc, feature_name):
      '''Find and return a :class:`~dossier.fc.StringCounter` at
      `feature_name` or at `DISPLAY_PREFIX` + `feature_name` in the
      `fc`, or return None.
  
      '''
      if feature_name not in fc:
          feature = fc.get(FC.DISPLAY_PREFIX + feature_name)
      else:
          feature = fc.get(feature_name)
      if isinstance(feature, StringCounter):
          return feature
      else:
          return Nonf get_string_counter(fc, feature_name):
      '''Find and return a :class:`~dossier.fc.StringCounter` at
      `feature_name` or at `DISPLAY_PREFIX` + `feature_name` in the
      `fc`, or return None.
  
      '''
      if feature_name not in fc:
          feature = fc.get(FC.DISPLAY_PREFIX + feature_name)
      else:
          feature = fc.get(feature_name)
      if isinstance(feature, StringCounter):
          return feature
      else:
          return None
docs: Find and return a :class:`~dossier.fc.StringCounter` at
      `feature_name` or at `DISPLAY_PREFIX` + `feature_name` in the
      `fc`, or return None.