private ArraytypesConfig.Builder createArrayBuilder(String [] strings) {
        ArraytypesConfig.Builder builder = new ArraytypesConfig.Builder();
        for (String str : strings) {
            builder.stringarr(str);
        }
        return builder;
    }
SEO keywords: test override() on builders. overrideTest, testOverride

@author Ulf Lilleengen
config/src/test/java/com/yahoo/vespa/config/ConfigBuilderMergeTest.java