function predictRuntime(config, runtimes) {
		var up, runtime;

		up = new Uploader(config);
		runtime = Runtime.thatCan(up.getOption('required_features'), runtimes || config.runtimes);
		up.destroy();
		return runtime;
	}
A way to predict what runtime will be choosen in the current environment with the
specified settings.

@method predictRuntime
@static
@param {Object|String} config Plupload settings to check
@param {String} [runtimes] Comma-separated list of runtimes to check against
@return {String} Type of compatible runtime