Edit: abstract-schema-piece.php
<?php namespace Yoast\WP\SEO\Generators\Schema; use Yoast\WP\SEO\Context\Meta_Tags_Context; use Yoast\WP\SEO\Surfaces\Helpers_Surface; /** * Class Abstract_Schema_Piece. */ abstract class Abstract_Schema_Piece { /** * The meta tags context. * * @var Meta_Tags_Context */ public $context; /** * The helpers surface * * @var Helpers_Surface */ public $helpers; /** * Optional identifier for this schema piece. * * Used in the `Schema_Generator::filter_graph_pieces_to_generate()` method. * * @var string */ public $identifier; /** * Generates the schema piece. * * @return mixed */ abstract public function generate(); /** * Determines whether the schema piece is needed. * * @return bool */ abstract public function is_needed(); }
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