public static Set<Map.Entry<String, RpcClient>> getAllClientEntries() {
        return CLIENT_MAP.entrySet();
    }
@Test
    void testGetAllClientEntries() throws IllegalAccessException {
        assertTrue(RpcClientFactory.getAllClientEntries().isEmpty());
        
        clientMapField.set(null, Collections.singletonMap("testClient", rpcClient));
        assertEquals(1, RpcClientFactory.getAllClientEntries().size());
    }