code: def move_window(self):
      if self.window_end <= len(self.text) - 1:
          # remove left letter from hash value
          self.hash -= (
              ord(self.text[self.window_start]) - ord("a") + 1
          ) * 26 ** (self.size_word - 1)
          self.hash *= 26
          self.hash += ord(self.text[self.window_end]) - ord("a") + 1
          self.window_start += 1
          self.window_end += 1
  
label_desc: Use image node_id 2 for calling the RollingHash obj's underlying member method code with example usage: obj.move_window() without return types