maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult newMessageArrived(
    1. MessengerExternalEventNewMessageArrived value
    )?,
  2. 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( MessengerExternalEventNewMessageArrived value)?  newMessageArrived,required TResult orElse(),}){
final _that = this;
switch (_that) {
case MessengerExternalEventNewMessageArrived() when newMessageArrived != null:
return newMessageArrived(_that);case _:
  return orElse();

}
}