ProcessId processId() {
        return processId;
    }
@Test
    public void shouldSetProcessId() {
        assertEquals(PID_1, new ClientState(PID_1, 1).processId());
        assertEquals(PID_2, new ClientState(PID_2, mkMap()).processId());
        assertEquals(PID_3, new ClientState(PID_3, 1, mkMap()).processId());
        assertNull(new ClientState().processId());
    }