private static ContentClusterBuilder createClusterBuilderWithOnlyDefaultTypes() {
        return new ContentClusterBuilder()
                .docTypes(List.of(DocType.index("marve"), DocType.index("fleksnes")));
    }
Unit tests for content search cluster.

@author geirst
config-model/src/test/java/com/yahoo/vespa/model/content/ContentSchemaClusterTest.java