<?php /** * WPSEO plugin file. * * @package WPSEO\Frontend\Schema */ if ( ! interface_exists( 'WPSEO_Graph_Piece' ) ) { /** * An interface for registering Schema Graph Pieces. * * @since 10.2 * @deprecated 14.0 */ interface WPSEO_Graph_Piece { /** * Add your piece of the graph. * * @return array|bool A graph piece on success, false on failure. */ public function generate(); /** * Determines whether or not a piece should be added to the graph. * * @return bool */ public function is_needed(); } }