// Now check that we get the right return value, indicating that the first path succeeded but
// the second got a MonitorUpdateFailed err. This implies PaymentSendFailure::PartialFailure as
// some paths succeeded, preventing retry.
// Now check that we get the right return value, indicating that the first path succeeded but
// the second got a MonitorUpdateFailed err. This implies PaymentSendFailure::PartialFailure as
// some paths succeeded, preventing retry.