michael@0: assertEq(
michael@0:     ""+new Proxy(
michael@0:         {toString:() => "inner toString"},
michael@0:         {get:(t, pk) => (pk === "toString" ? () => "proxy toString" : t[pk])}),
michael@0:     "proxy toString")
michael@0: assertEq(
michael@0:     ""+new Proxy(
michael@0:         {valueOf:() => "inner valueOf"},
michael@0:         {get:(t, pk) => (pk === "valueOf" ? () => "proxy valueOf" : t[pk])}),
michael@0:     "proxy valueOf")