Metaclass
A metaclass describes commen behaviour for classes, like a class does for objects / From Wikipedia, the free encyclopedia
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In object-oriented programming, a metaclass is a class whose instances are also classes. Just as an ordinary class defines the behavior of certain objects, a metaclass defines the behavior of certain classes and their instances. Not all object-oriented programming languages support metaclasses. Among those that do, the extent to which metaclasses can override any given aspect of class behavior varies. Metaclasses can be implemented by having classes be first-class citizens, in which case a metaclass is simply an object that constructs classes. Each language has its own metaobject protocol, a set of rules that govern how objects, classes, and metaclasses interact.[1] Metaclasses can be used, for example, to generate code automatically, or in developing frameworks.[2]
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