code: def words(min_size, max_size = None):
          
          max_size = max_size if max_size != None else min_size
          result = ""
          
          count = RandomInteger.next_integer(min_size, max_size)
          for i in range(count):
              result += random.choice(_all_words)
  
          return result
docs: Generates a random text that consists of random number of random words separated by spaces.
  
          :param min_size: (optional) a minimum number of words.
  
          :param max_size: a maximum number of words.
  
          :return: a random text.