Casting nested wrappers back to their parents

[fiery rampart]

When your question is answered use !solved to mark the question as resolved.

Remember to ask specific questions, provide necessary details, and reduce your question to its simplest form. For tips on how to ask a good question use !howto ask.

[austere sun]

please post minimal code along with the compiler error

your question is way too abstract and questionably worded for anyone to reason about it