private VespaModel createDualContentCluster() {
        String xml =
                "<services>" +
                        "<admin version=\"2.0\">" +
                        "  <adminserver hostalias=\"node0\"/>" +
                        "</admin>" +
                        "<content version=\"1.0\" id=\"foo_c\">" +
                        "  <redundancy>1</redundancy>" +
                        "  <documents>" +
                        "    <document type=\"bunnies\" mode=\"index\"/>" +
                        "    <document type=\"hares\" mode=\"index\"/>" +
                        "  </documents>" +
                        "  <group>" +
                        "    <node distribution-key=\"0\" hostalias=\"node0\"/>" +
                        "  </group>" +
                        "</content>" +
                        "<content version=\"1.0\" id=\"bar_c\">" +
                        "  <redundancy>1</redundancy>" +
                        "  <documents>" +
                        "    <document type=\"rabbits\" mode=\"index\" global=\"true\"/>" +
                        "  </documents>" +
                        "  <group>" +
                        "    <node distribution-key=\"0\" hostalias=\"node0\"/>" +
                        "  </group>" +
                        "</content>" +
                        "</services>";
        List<String> sds = ApplicationPackageUtils.generateSchemas("bunnies", "hares", "rabbits");
        return new VespaModelCreatorWithMockPkg(getHosts(), xml, sds).create();
    }
Here there is no good choice.
config-model/src/test/java/com/yahoo/vespa/model/content/ContentClusterTest.java