code: def contains(self, name: str) -> List[str]:
          
          return sorted(keyword for keyword in self if name in keyword)
docs: Return a list of all keywords containing the given string.
  
          >>> from hydpy.core.devicetools import Keywords
          >>> keywords = Keywords('first_keyword', 'second_keyword',
          ...                     'keyword_3', 'keyword_4',
          ...                     'keyboard')
          >>> keywords.contains('keyword')
          ['first_keyword', 'keyword_3', 'keyword_4', 'second_keyword']