final Map<String, Object> map = Map.of("count", 42);
        assertEquals("42", coordinatorHelper.getStringValue(map, "count"));
    }

    @Test
    public void test_getStringValue_null() {
        final Map<String, Object> map = new HashMap<>();
        map.put("key", null);
        assertNull(coordinatorHelper.getStringValue(map, "key"));
    }

    @Test