code: def lowercased_words(content, filter=True, predicate=None):
      
      return (w.lower() for w in words(content, filter, predicate))
docs: \
      Returns an iterable of lowercased words from the provided text.
      
      `content`
          A text.
      `filter`
          Indicates if stop words and garbage like "xxxxxx" should be removed from
          the word list.
      `predicate`
          An alternative word filter. If it is ``None`` "xxxx", "---",
          default stop words, and words which have no min. length of 3 are filtered
          (iff ``filter`` is set to ``True``).
      
      >>> list(lowercased_words('Hello and goodbye ------ '))
      ['hello', 'goodbye']
      >>> list(lowercased_words('Hello, and goodbye ------ Subject xxxxxxxxx XXXXXXXXXXXX here'))
      ['hello', 'goodbye', 'subject']
      >>> list(lowercased_words('Hello, and goodbye.How are you?'))
      ['hello', 'goodbye']