<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def fetch_next_page(self):
 """Retrieves the next page of data and refreshes Pages instance."""

        result = self.request_handler.get(url=self.next_page_url).json()
        self.__init__(self.request_handler, result,
                      self.data_type, self.automatic_pagination)