public FollowJointTrajectoryActionFeedback(HeaderMessage header, FollowJointTrajectoryFeedback feedback)
 {
     this.header   = header;
     this.feedback = feedback;
 }
 public FollowJointTrajectoryActionFeedback()
 {
     this.header   = new HeaderMessage();
     this.feedback = new FollowJointTrajectoryFeedback();
 }