public SpinJsonPathException unableToEvaluateJsonPathExpressionOnNode(
     SpinJsonNode node, Exception cause) {
   return new SpinJsonPathException(
       exceptionMessage(
           "013",
           "Unable to evaluate JsonPath expression on element '{}'",
           node.getClass().getName()),
       cause);
 }
  public void testSpin_JSON_Available() {

    SpinJsonNode spinJsonEl = executeExpression("${ JSON('" + jsonString + "') }");
    assertNotNull(spinJsonEl);
    assertEquals("bar", spinJsonEl.prop("foo").stringValue());
  }