static void traverseRootsTyped(AbstractCompiler compiler, Callback cb, Node externs, Node root) {
NodeTraversal t = new NodeTraversal(compiler, cb, SyntacticScopeCreator.makeTyped(compiler));
t.traverseRoots(externs, root);
}
public static void traverseTyped(AbstractCompiler compiler, Node root, Callback cb) {
NodeTraversal t = new NodeTraversal(compiler, cb, SyntacticScopeCreator.makeTyped(compiler));
t.traverse(root);
}