code: function(obj) {
      var self = this
      if (obj.runMainInFiber) { // default is false
        console.warn('"runMainInFiber" is DEPRECATED. Please wrap all applications in "__" instead.')
        __(function() {
          self._invokeMain(obj)
        })
      } else {
        self._invokeMain(obj)
      }
    }
docs: ***************************************************************************
  @method _runMain
  @description Calls {@link atom.Atom._invokeMain} and prints a deprecation warning
  if ``obj.runMainInFiber`` is ``true``
  @ignore