@Override
    public List<String> splitAndEvaluate() {
        return Strings.isNullOrEmpty(inlineExpression) ? Collections.emptyList() : split(inlineExpression);
    }
@Test
    void assertEvaluateForExpressionIsNull() {
        InlineExpressionParser parser = TypedSPILoader.getService(InlineExpressionParser.class, "LITERAL", new Properties());
        List<String> expected = parser.splitAndEvaluate();
        assertThat(expected, is(Collections.<String>emptyList()));
    }