@Test
    public void shouldContainKey() {
        final Parameters parameters = new Parameters();
        parameters.set(null, "a", "axe", "b", "bat", "c", "cat");

        assertThat(parameters.contains("b"), is(true));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/util/ParametersTest.java