Indication of the results of attempting to resolve the user utterance against the defined slot types.
For this enum type, if a value unknown to the SDK is returned the UNKNOWN_TO_SDK_VERSION
enumeration value will be returned. To directly return the raw String value, use getCodeAsString().
Get the underlying String value for code.
Using this accessor will retrieve the raw underlying value, even if it is not
present in the corresponding enumeration. For forward compatibility, it is recommended
to use this approach over the enumeration.