f8/sdk/dart/package-fidl_fidl/AsyncProxyController/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/AsyncProxyController/bind.md">bind</a>).</p>



## Implementation

```dart
InterfaceHandle<T> unbind() {
  if (!isBound) {
    throw FidlStateException(
        "AsyncProxyController<${$interfaceName}> isn't bound");
  }
  if (!_reader.isBound) {
    throw FidlError(
        "AsyncProxyController<${$interfaceName}> reader isn't bound");
  }

  state = InterfaceState.closed;

  return InterfaceHandle<T>(_reader.unbind());
}
```