maybeWhen<TResult extends Object?> method

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult $default(int books, int authors, int publishers, int subjects,)?, { required TResult orElse(), })

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( int books,  int authors,  int publishers,  int subjects)?  $default,{required TResult orElse(),}) {final _that = this;
switch (_that) {
case _Stats() when $default != null:
return $default(_that.books,_that.authors,_that.publishers,_that.subjects);case _:
  return orElse();

}
}