code: function exposeNative(Browser, command, exposed) {
      if (_.isNumber(exposed)) {
          exposed = command;
      }
  
      Browser.prototype[exposed] = function () {
          ensureDriverCommand.call(this, command, 'exposeNative');
          var args = wrapArguments.call(this, arguments, errorToExceptionCallback);
          this._driver[command].apply(this._driver, args);
  
          return this;
      };
  }
docs: exposed methods handle errors as exceptions.