lookup method

  1. @override
T? lookup(
  1. Object? element
)
override

If an object equal to element is in the set, return it.

Checks whether element is in the set, like contains, and if so, returns the object in the set, otherwise returns null.

Implementation

@override
T? lookup(Object? element) {
  assert(_debugAssertNotDisposed());
  return _set!.lookup(element);
}