Handle error if not nil, and not among ignored ones.

Handle error if not nil, and not among ignored ones.

Handle error if not nil, and not among ignored ones.

Retrieve last error.

Check if last error was of this kind.

Register custom callback to handle error.

Reset callback function to fmt.Fprintln(os.Stderr, err).

Wrapper for function of type func[T any]() (T, error).

Wrapper for function of type func[T, U any]() (T, U, error).

Callback function to handle error.