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TODO
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- check out what chromatic said:

I think you can check the class key <_ISA to see if it has expired. 

- switch to Context::Handle for method modifiers

Should probably write some more tests to verify this works correctly
when we add it in, to make sure we don't break weird stuff.

- add ::Attribute::Collection types

mugwump was working on this ...

- do not bless methods unless asked

We should turn off automagic method blessing for classes which are 
not explictly asking for a metaclass.

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EXAMPLES TO WRITE
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- Prototype-style example

Make a C::MOP::Class subclass which has an AUTOLOAD method, the 
method will DWIM depending up on the value it is passed.

  Foo->prototype->say_hello(sub { print "Hello" });

This will turn into this:

  Foo->prototype->add_method('say_hello' => sub { print "Hello" });

I am not sure how we should handle non-method arguments, mostly 
because those would be static prototype variables, which would 
translate to class package variables.