noopKeyHandler<K, T> function
Implementation
KeyedOptionsHandler<K, T> noopKeyHandler<K, T>(String? key) {
_log.severe(
"Missing/invalid handler for $T and key $key -- using noop handler");
return _KeyedOptionsHandler<K, T>(
"noop",
canShowAll: false,
placeholder: "Invalid configuration.",
toOption: (T? from) => from == null
? null
: Option.keyed<K, T>(null, null, label: "Invalid configuration: $from"),
toKey: (T from) => null,
);
}