GetCaller returns the caller of the function that calls it.

TODO search the public functions HandleCrash simply catches a crash and logs an error.

HandlerError is a method to invoke when a non-user facing piece of code cannot return an error and needs to indicate it has been ignored.

ErrorHandlers is a list of functions which will be invoked when an unreturnable error occurs.

PanicHandlers is a list of functions which will be invoked when a panic happens.

For testing, bypass HandleCrash.