This is stripped down version of what its I am doing but I don't know how to solve it, I am not good at lifetimes but also keeps saying '1 error with E0521

There this clue with

but I don’t how to implement since I need to return a function pointer in a struct in a function

I have reached reply limit so I am going edit.

It worked like a charm also help me understand how this work and why does for<‘a> doesn’t work here and also help me understand bit more about lifetime does adding T: ‘a work or too excessive

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