public static void addTestNode(Class<? extends ExecNode<?>> execNodeClass) {
        addToLookupMap(execNodeClass);
    }
@Test
    void testNoJsonCreator() {
        assertThatThrownBy(() -> ExecNodeMetadataUtil.addTestNode(DummyNodeNoJsonCreator.class))
                .isInstanceOf(IllegalStateException.class)
                .hasMessage(
                        "ExecNode: org.apache.flink.table.planner.plan.utils."
                                + "ExecNodeMetadataUtilTest.DummyNodeNoJsonCreator does not "
                                + "implement @JsonCreator annotation on constructor.");
    }