assertEquals(42L, handle.getTreeId());
        verify(treeConnection).getTreeId();
    }

    @Test
    @DisplayName("send(Request, varargs) delegates with null response")
    void sendWithRequestVarargsDelegates() throws Exception {
        // Verifies Request<T> overload forwards to the varargs form with a null response
        @SuppressWarnings("unchecked")