protected function prepend_shop_page() {
		$permalinks   = wc_get_permalink_structure();
		$shop_page_id = wc_get_page_id( 'shop' );
		$shop_page    = get_post( $shop_page_id );

		// If permalinks contain the shop page in the URI prepend the breadcrumb with shop.
		if ( $shop_page_id && $shop_page && isset( $permalinks['product_base'] ) && strstr( $permalinks['product_base'], '/' . $shop_page->post_name ) && intval( get_option( 'page_on_front' ) ) !== $shop_page_id ) {
			$this->add_crumb( get_the_title( $shop_page ), get_permalink( $shop_page ) );
		}
	}