@Test
    public void shouldAllowEvenNumberOfKeyValuesAndValidKeys() {
        ElementHelper.legalPropertyKeyValueArray("aKey", "test", "value-for-this-one", 1, "1", "none");
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/util/ElementHelperTest.java