* Use AttributeError instead of ApiKeyError because that's what the hasattr builtin function uses
* Use AttributeError instead of ApiKeyError because that's what the hasattr builtin function uses
* fix unit tests
* create ApiAttributeError exception
* fix formatting
* run samples scripts
* Adds composed model support for allOf oneOf anyOf
* Moves discriminator into discriminator() class method, adds test_deserialize_lizard, adds setting discriminator using allOf schema