computeSingleJsoImplData(singleJsoImplTypes,
mangledNamesToImplementations);
MyInstanceMethodOracle mapper = new MyInstanceMethodOracle(jsoTypes,
typeOracle.getJavaLangObject());
classRewriter = new HostedModeClassRewriter(jsoTypeNames, jsoSuperTypes,
mangledNamesToImplementations, singleJsoImplTypes, mapper);
} else {
// If we couldn't find the JSO class, we don't need to do any rewrites.
classRewriter = null;
}