throws Throwable
throws IOException
    public void varDumpImpl(Env env,                            WriteStream out,                            int depth,                            IdentityHashMap<Value, String> valueSet)      throws Throwable    {      printDepth(out, 2 * depth);      out.println("[\"" + getKey() + "\"]=>");      printDepth(out, 2 * depth);            _value.varDump(env, out, depth, valueSet);            out.println();    }