# handleUnhandledStanza function

Future <void> handleUnhandledStanza(

1. XmppConnection conn,
2. StanzaHandlerData data

)

Bounce a stanza if it was not handled by any manager. `conn` is the connection object to use for sending the stanza. `data` is the StanzaHandlerData of the unhandled stanza.

## Implementation

    Future<void> handleUnhandledStanza(
      XmppConnection conn,
      StanzaHandlerData data,
    ) async {
      if (data.stanza.type != 'error' && data.stanza.type != 'result') {
        final stanza = data.stanza.copyWith(
          to: data.stanza.from,
          from: data.stanza.to,
          type: 'error',
          children: [
            buildErrorElement(
              'cancel',
              'feature-not-implemented',
            ),
          ],
        );

        await conn.sendStanza(
          StanzaDetails(
            stanza,
            awaitable: false,
            forceEncryption: data.encrypted,
          ),
        );
      }
    }