apper.unwrap and any <code>DecodingError</code> that has been thrown by another entity, this function will throw <code><a href="../Classes/MetaDecoder/Errors.html#/s:17MetaSerialization0A7DecoderC6ErrorsO23decodingHasNotSucceededyA2EmF">MetaDecoder.Errors.decodingHasNotSucceeded</a></code> if the decoding could not succeed. In general, this error will never be thrown in code running unter the debug (and not the release) configuration. Instead the call will fail with an assertion failure. Such an error usual