connection.removeSigHandler(Signal.ReceiptReceivedV2.class, signal, this.dbusRcptHandler);
connection.removeSigHandler(Signal.SyncMessageReceivedV2.class, signal, this.dbusSyncHandler);
} catch (DBusException e) {
connection.removeSigHandler(Signal.ReceiptReceivedV2.class, signal, this.dbusRcptHandler);
connection.removeSigHandler(Signal.SyncMessageReceivedV2.class, signal, this.dbusSyncHandler);
} catch (DBusException e) {