// test that it consistently returns null for any input
        assertNull(invokeMethod(provider, "findOnMainSchema", "TestClassification"));
        assertNull(invokeMethod(provider, "findOnMainSchema", ""));
        assertNull(invokeMethod(provider, "findOnMainSchema", "Some.Classification"));
        assertNull(invokeMethod(provider, "findOnMainSchema", "Project.TestClassification"));
    }

    @Test

        final ClassificationMeta onMainSchema = findOnMainSchema(classificationName);
        if (onMainSchema == null) {
            final String msg = "Not found the classification: " + classificationName;
            throw new ProvidedClassificationNotFoundException(msg);
        }
        return onMainSchema;
    }