@Override
    public void start(final Xid xid, final int flags) throws XAException {
        try {
            delegate.start(xid, flags);
        } catch (final XAException ex) {
            throw mapXAException(ex);
        }
    }
@Test
    void assertStart() throws XAException {
        singleXAResource.start(xid, 1);
        verify(xaResource).start(xid, 1);
    }