prototype bind support?

Hi, my question kind of relates to my question from: generic pause/wait? I'm trying to wrap my head around how prototypeing works. does the Espruino support bind? For example:

setTimeout(function (e) { this.getSensorReading(); }.bind(this), w); //Attempting to execute getSensorReading()

I receive error:

Uncaught Error: Function "bind" not found!
 at line 8 col 58
...this.getSensorReading(); }.bind(this), w); //Attempting to e...
                               ^
in function "getSensorResult" called from line 1 col 20
ph.getSensorResult();