code: def closest_hexameter_patterns(self, scansion: str) -> List[str]:
          
          return self._closest_patterns(self.VALID_HEXAMETERS, scansion)
docs: Find the closest group of matching valid hexameter patterns.
  
          :return: list of the closest valid hexameter patterns; only candidates with a matching
          length/number of syllables are considered.
  
          >>> print(MetricalValidator().closest_hexameter_patterns('-UUUUU-----UU--'))
          ['-UU-UU-----UU--']