KeyValueCoding provides methods to access instance variables of the object. The methods try accessing instance variables by using accessor method. If it is failure, its try accessing directly.
If a class method "access_instance_variables?" defines in the class and the method returns "true", the direct access is success. Or failure.
directly?
handle_retrieve_value
handle_take_value
retrieve_value
take_value
Hook method invoked from retrieve_value() when method for the key is not found.
Hook method invoked from take_value() when method for the key is not found.
Retrieves value of the instance variable with method chain.
Sets value for the instance variable with method chain.