maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult never(
    1. ExpirationNever value
    )?,
  2. TResult timeout(
    1. ExpirationTimeout value
    )?,
  3. TResult timestamp(
    1. ExpirationTimestamp value
    )?,
  4. required TResult orElse(),
})

A variant of map that fallback to returning orElse.

It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeMap<TResult extends Object?>({TResult Function( ExpirationNever value)?  never,TResult Function( ExpirationTimeout value)?  timeout,TResult Function( ExpirationTimestamp value)?  timestamp,required TResult orElse(),}){
final _that = this;
switch (_that) {
case ExpirationNever() when never != null:
return never(_that);case ExpirationTimeout() when timeout != null:
return timeout(_that);case ExpirationTimestamp() when timestamp != null:
return timestamp(_that);case _:
  return orElse();

}
}