protected boolean isEmptyText(JsonNode jsonNode) {
        return jsonNode.textValue() == null || jsonNode.textValue().isEmpty();
    }
@Test
    public void isEmptyText() {
        assertThat(expressionEvaluator.isEmptyText(new TextNode(""))).isTrue();
        assertThat(expressionEvaluator.isEmptyText(new TextNode(VALUE))).isFalse();
        assertThat(expressionEvaluator.isEmptyText(new ObjectNode(factory))).isTrue();
    }