code: def startswith(self, prefix, start=0, end=-1):
          
          return self.value_no_colors.startswith(prefix, start, end)
docs: Return True if string starts with the specified prefix, False otherwise.
  
          With optional start, test beginning at that position. With optional end, stop comparing at that position. prefix
          can also be a tuple of strings to try.
  
          :param str prefix: Prefix to search.
          :param int start: Beginning position.
          :param int end: Stop comparison at this position.