do_action( 'restrict_manage_sites', string $which )

332			 * Fires before the Filter button on the MS sites list table.333			 *334			 * @since 5.3.0335			 *336			 * @param string $which The location of the extra table nav markup: Either 'top' or 'bottom'.337			 */338			do_action( 'restrict_manage_sites', $which );339 340			$output = ob_get_clean();341 342			if ( ! empty( $output ) ) {343				echo $output;344				submit_button( __( 'Filter' ), '', 'filter_action', false, array( 'id' => 'site-query-submit' ) );