def find_cart_items(options)
			conditions = {:resource_id => nil, :parent_id => nil}
			conditions[:resource_id] = options[:resource].id.to_s if options[:resource]
			Auth.configuration.cart_item_class.constantize.where(conditions)
		end
def find_cart_items(options)
			conditions = {:resource_id => nil, :parent_id => nil}
			conditions[:resource_id] = options[:resource].id.to_s if options[:resource]
			Auth.configuration.cart_item_class.constantize.where(conditions)
		end
used in cart_item_controller_concern#index
 if there is a resource, will return all cart items with that resource id.
 if there is no resource, will return all cart items with a nil rsource.