code: function getRefundPolicy( cart ) {
  	if ( cartItems.hasDomainRegistration( cart ) && cartItems.hasPlan( cart ) ) {
  		return 'planWithDomainRefund';
  	}
  
  	if ( cartItems.hasDomainRegistration( cart ) ) {
  		return 'domainRefund';
  	}
  
  	return 'genericRefund';
  }
docs: Return a string that represents the overall refund policy for all the items
  in the shopping cart. See the support documentation for more details on
  these policies:
  
  https://en.support.wordpress.com/refunds/
  
  @param {Object} cart - cart as `CartValue` object
  @returns {string} the refund policy type