WP_Comments_List_Table::extra_tablenav( string $which )

419	protected function extra_tablenav( $which ) {420		global $comment_status, $comment_type;421		static $has_items;422 423		if ( ! isset( $has_items ) ) {424			$has_items = $this->has_items();425		}426 427		echo '<div class="alignleft actions">';428 429		if ( 'top' === $which ) {430			ob_start();431 432			$this->comment_type_dropdown( $comment_type );433 434			/**435			 * Fires just before the Filter submit button for comment types.436			 *437			 * @since 3.5.0438			 */439			do_action( 'restrict_manage_comments' );440 441			$output = ob_get_clean();442 443			if ( ! empty( $output ) && $this->has_items() ) {444				echo $output;445				submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );446			}447		}448 449		if ( ( 'spam' === $comment_status || 'trash' === $comment_status ) && $has_items450			&& current_user_can( 'moderate_comments' )451		) {452			wp_nonce_field( 'bulk-destroy', '_destroy_nonce' );453			$title = ( 'spam' === $comment_status ) ? esc_attr__( 'Empty Spam' ) : esc_attr__( 'Empty Trash' );454			submit_button( $title, 'apply', 'delete_all', false );455		}456 457		/**458		 * Fires after the Filter submit button for comment types.459		 *460		 * @since 2.5.0461		 * @since 5.6.0 The `$which` parameter was added.462		 *463		 * @param string $comment_status The comment status name. Default 'All'.464		 * @param string $which          The location of the extra table nav markup: Either 'top' or 'bottom'.465		 */466		do_action( 'manage_comments_nav', $comment_status, $which );467 468		echo '</div>';469	}