@Theory
    public void shouldReturnFalseWhenContainsKeyOnEmptyMap(int size) {
        CaseInsensitiveStringMultiMap actual = new CaseInsensitiveStringMultiMap(size);
        Assert.assertFalse(actual.containsKey("z"));
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/beans/src/test/java/io/apiman/gateway/engine/beans/util/CaseInsensitiveStringMultiMapTest.java