Recover attempts to recover from a panic.
The recover must be attempted in a deferred statement as normal execution flow has been halted.
The recover statement must appear directly within the deferred function enclosure.
Recover statements in functions called by deferred function calls will not be honored.
The recover() call will return the argument provided to the initial panic, if the program is currently panicking.
If the program is not currently panicking, recover() will return nil.