@Test(expected = NullPointerException.class)
public void tryToInvokeIsMarkedWithOnlyNullMarker() {

    final JsonValueFieldDefinition<JsonArray> underTest =
            JsonValueFieldDefinition.newInstance(KNOWN_JSON_POINTER, JsonArray.class, JsonValue::isArray,
                    JsonValue::asArray, knownFieldMarkers);
    underTest.isMarkedAs(null);
}