public static boolean isEcho(String parameterTypesDesc, String method) {
        return $ECHO.equals(method) && $ECHO_PARAMETER_DESC.equals(parameterTypesDesc);
    }
@Test
    void testIsEcho() {
        Assertions.assertTrue(RpcUtils.isEcho("Ljava/lang/Object;", "$echo"));
        Assertions.assertFalse(RpcUtils.isEcho("Ljava/lang/Object;", "testMethod"));
        Assertions.assertFalse(RpcUtils.isEcho("Ljava/lang/String;", "$echo"));
    }