code: public static void removeName(Node n) {
      checkState(n.isFunction() || n.isClass());
      Node originalName = n.getFirstChild();
      Node emptyName = n.isFunction() ? IR.name("") : IR.empty();
      n.replaceChild(originalName, emptyName.useSourceInfoFrom(originalName));
    }
docs: Set the given function/class node to an empty name