[Maya-Python] Ask help on iterating user define type

[Yeah.Y]

Hi, I'm a newbie to Maya API, I have a question need your help,
I cannot iterate on my own defined new type, for instance "jitter"

The normal iterator only support build-in types such as MFn::kXXX
type, but how about the "jitter".

Is there a mechanism which can add a new type in API ??

the code example:

// for loop for iterate on locator type.
for ( MItDependencyNodes iter( MFn::kLocator); !iter.isDone();
iter.next()){
    //do somthing iter.item()
}
//the end

I mean that how can I change the MFn::kLocator to another type which
my own defined??

Thanks a lot & Best.

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