noopHandler<T> function
Implementation
OptionsHandler<T?> noopHandler<T>(String? key) {
_log.severe(
"Missing/invalid handler for $T and key $key -- using noop handler");
return OptionsHandler<T?>.ofList(
"noop",
canShowAll: false,
placeholder: "Invalid configuration.",
toOption: (T? from) => Option<T?>(null, label: "N/A"),
);
}