function new_page()
 {
     $this->_pdf->close_object();
     // Add the object to the current page
     $this->_pdf->add_object($this->_current_page_id, "add");
     $this->_pdf->new_page();
     Page_Cache::store_page($this->_cache_id, $this->_pdf->get_page_number() - 1, $this->_pdf->serialize_object($this->_current_page_id));
     $this->_current_page_id = $this->_pdf->open_object();
     return $this->_current_page_id;
 }