f8/sdk/dart/package-fidl_fidl/ProxyController/unbind.md

# unbind method








[InterfaceHandle](../../package-fidl_fidl/InterfaceHandle-class.md)<T> unbind
()





<p>Unbinds the proxy and returns the unbound channel as an interface handle.</p>
<p>Calls on the proxy will no longer be encoded as messages on the bound
channel.</p>
<p>The proxy must have previously been bound (e.g., using <a href="../../package-fidl_fidl/ProxyController/bind.md">bind</a>).</p>



## Implementation

```dart
InterfaceHandle<T>? unbind() {
  assert(isBound);
  if (!_reader.isBound) {
    return null;
  }

  final callback = onUnbind;
  if (callback != null) {
    callback();
  }

  // TODO(rosswang): Do we need to _reset() here?
  return InterfaceHandle<T>(_reader.unbind());
}
```