interactive marker - processFeedback()

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Hi,

I want to have an interactive marker as part of a class that I'm making, but am running into trouble with the processFeedback() as a member function.

I can define it as static void processFeedback() which works but then I need to pass an instance to the function (which I can't seem to figure out how to do).

When I don't make the function static I get a bunch of boost errors and no match for call to .... error.

How do I either pass the static function an instance or how do I define the function so that I don't have to use static?