oop string_at(int which, TRAPS) {

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

        constantPoolHandle h_this(THREAD, this);

  {- -------------------------------------------
  (1) constantPoolOopDesc::string_at_impl() を呼び出し, 結果をリターンするだけ.
      ---------------------------------------- -}

        return string_at_impl(h_this, which, CHECK_NULL);
      }