code: func (c *Client) DynoRestart(appIdentity, dynoIdentity, message string) error {
  	rh := RequestHeaders{CommitMessage: message}
  	return c.DeleteWithHeaders("/apps/"+appIdentity+"/dynos/"+dynoIdentity, rh.Headers())
  }
docs: // Restart dyno.
  //
  // appIdentity is the unique identifier of the Dyno's App. dynoIdentity is the
  // unique identifier of the Dyno.