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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _new_page(self):
 """Helper function to start a new page. Not intended for external use. """

        self._current_page = Drawing(*self._pagesize)
        if self._bgimage:
            self._current_page.add(self._bgimage)
        self._pages.append(self._current_page)
        self.page_count += 1
        self._position = [1, 0]