public function prepare_items() {
		$this->event_id = Tribe__Utils__Array::get( $_GET, 'event_id', Tribe__Utils__Array::get( $_GET, 'post_id', 0 ) );

		$items       = self::get_orders( $this->event_id );
		$total_items = count( $items );
		$per_page    = $this->get_items_per_page( $this->per_page_option );

		/**
		 * Allow plugins to modify the default number of orders shown per page.
		 *
		 * @since 4.9.2
		 *
		 * @param int The number of orders shown per page.
		 */
		$per_page = apply_filters( 'tribe_tickets_plus_order_pagination', $per_page );

		$this->valid_order_items = self::get_valid_order_items_for_event( $this->event_id, $items );

		$current_page = $this->get_pagenum();

		$this->items = array_slice( $items, ( $current_page - 1 ) * $per_page, $per_page );

		$this->set_pagination_args(
			array(
				'total_items' => $total_items,
				'per_page'    => $per_page,
			)
		);
	}