Automattic / jetpack

			$attributes['required'] = false;

		// parse out comma-separated options list (for selects, radios, and checkbox-multiples)

		if ( !empty( $attributes['options'] ) && is_string( $attributes['options'] ) ) {

			$attributes['options'] = array_map( 'trim', explode( ',', $attributes['options'] ) );

		}

		if ( $form ) {

			// make a unique field ID based on the label, with an incrementing number if needed to avoid clashes

		// convert list of modules in comma-delimited format into an array

		// of "$modulename => true"

		if ( isset( $args['modules'] ) && !empty( $args['modules'] ) ) {

			$modules = array_map( '__return_true', array_flip( array_map('trim', explode( ',', $args['modules'] ) ) ) );

		}

		foreach ( array( 'posts', 'comments', 'users' ) as $module_name ) {

			if ( isset( $args[ $module_name ] ) ) {

		$args = $this->query_args();

		if ( isset( $args['columns'] ) ) {

			$columns = array_map('trim', explode( ',', $args['columns'] ) );

		} else {

			$columns = null; // go with defaults

		}

		require_once dirname(__FILE__) . '/../../sync/class.jetpack-sync-wp-replicastore.php';