remove method

Future<bool> remove(T element, Capability removeCapability)

Removes the element from the registry.

Returns true if removing the element succeeded, and false if the elements either wasn't in the registry, or it couldn't be removed.

The removeCapability must be the same capability returned by add when the object was added. If the capability is wrong, the object is not removed, and this function returns false.

Implementation

Future<bool> remove(T element, Capability removeCapability) {
  var id = _cache.id(element);
  if (id == null) {
    // If the element is not in the cache, then it was not a value
    // that originally came from the registry.
    return Future<bool>.value(false);
  }
  var completer = Completer<bool>();
  var port = singleCompletePort(completer, callback: (bool result) {
    if (result) _cache.remove(id);
    return result;
  }, timeout: _timeout);
  _commandPort.send(list4(_removeValue, id, removeCapability, port));
  return completer.future;
}