public function _add_meta_boxes( $post_type, $post ) {
		$post_type_object = get_post_type_object( $post_type );
		if ( empty( $post_type_object ) || empty( $post_type_object->public ) ) {
			return;
		}

		add_meta_box(
			'wp-seo',
			__( 'SEO', 'inc2734-wp-seo' ),
			array( $this, '_wp_seo_meta_box' ),
			$post_type,
			'normal'
		);
	}