public SensorJoy() { header = new StandardHeader(); axes = new float[0]; buttons = new int[0]; }
public SensorCompressedImage() { header = new StandardHeader(); format = ""; data = new byte[0]; }
public NavigationOccupancyGrid() { header = new StandardHeader(); info = new NavigationMapMetaData(); data = null; }
public GeometryPoseStamped() { header = new StandardHeader(); pose = new GeometryPose(); }