public static Stella_Object symbolValueSetter(Symbol symbol, Stella_Object value) {
    { Cons vplist = symbol.symbolValueAndPlist;

      if (vplist == Stella.NIL) {
        vplist = Cons.cons(null, Stella.NIL);
        symbol.symbolValueAndPlist = vplist;
      }
      return (vplist.value = value);
    }
  }