when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. List<T> items,
    2. DocumentSnapshot<Object?>? lastDocument,
    3. bool hasMore
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( List<T> items,  DocumentSnapshot? lastDocument,  bool hasMore)  $default,) {final _that = this;
switch (_that) {
case _PaginatedResult():
return $default(_that.items,_that.lastDocument,_that.hasMore);case _:
  throw StateError('Unexpected subclass');

}
}