code: function(notification, options) {
        options = opts(this, options);
        return new APICall({
          action: 'push',
          type: 'POST',
          query: server_params(options),
          options: options,
          data: JSON.stringify(notification)
        });
      }
docs: Sends a push notification to your users.
  This requires an API key with push permission.
  @param {object} [notification] A notification object. This object can have one or more fields for dispatching the notification.
  @param {object} [options] Override defaults set on WebService. See WebService constructor for parameters.
  @return {APICall} An APICall instance for the web service request used to attach events.