def friendly_instance_for_attribute(attr)
      klass = friendly_attributes_configuration.model_for_attribute(attr)
      send DetailsDelegator.friendly_model_reader(klass)
    end
def friendly_instance_for_attribute(attr)
      klass = friendly_attributes_configuration.model_for_attribute(attr)
      send DetailsDelegator.friendly_model_reader(klass)
    end
Returns the Friendly instance corresponding to the specified attribute

 @param [Symbol, String] attr name of the attribute
 @return [Class] FriendyAttributes::Base instance