Annotates a method which will be called from "- (void)dealloc" method in the transpiled ObjC code.

Annotated method must be private, non-static, have no parameters, return void and there can be at most one such method.

This annotation is designed to be used in combination with @Weak (which translates to __unsafe_unretained). It can be used to nullify @Weak references or cleaning internal data structures containing @Weak references, to avoid dangling pointers in transpiled ObjC code.