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Simple Types==
Class Instance[]
A class instance is an instance of a class, usually created by calling it's constructor. These are known as Objects because they are a universal OOP programming concept
Enum Instance[]
An enum instance is an instance of an enum, usually created by calling one of the enums' constructors.
Anonymous Object[]
An anonymous object is an object with no class, with no template. As long as you keep it dynamic, you can add as many fields as you want to it.