implements TaskCallback, NewTransactionFragment.OnNewTransactionFragmentInteractionListener,
QR.QRScanTrigger, QR.QRScanResultReceiver, DescriptionSelectedCallback,
FabManager.FabHandler {
implements TaskCallback, NewTransactionFragment.OnNewTransactionFragmentInteractionListener,
QR.QRScanTrigger, QR.QRScanResultReceiver, DescriptionSelectedCallback,
FabManager.FabHandler {