michael@0: this.watch("x", Object.create)
michael@0: try {
michael@0:   (function() {
michael@0:     this.__defineGetter__("x",
michael@0:     function() {
michael@0:       return this
michael@0:     })
michael@0:   })()
michael@0: } catch(e) {}
michael@0: Object.defineProperty(x, "x", ({
michael@0:   set: Uint16Array
michael@0: }))
michael@0: