protected function delete_post( $id ) {
		if ( ! empty( $id->ID ) ) {
			$id = $id->ID;
		} elseif ( ! is_numeric( $id ) || 0 >= $id ) {
			return;
		}

		// Delete product attachments.
		$attachments = get_posts( array(
			'post_parent' => $id,
			'post_status' => 'any',
			'post_type'   => 'attachment',
		) );

		foreach ( (array) $attachments as $attachment ) {
			wp_delete_attachment( $attachment->ID, true );
		}

		// Delete product.
		$product = wc_get_product( $id );
		$product->delete( true );
	}