public void SetValues(StemDO obj)
		{
			if(obj == null) { return; }
			Stem_GUID = obj.Stem_GUID;
			Diameter = obj.Diameter;
			DiameterType = obj.DiameterType;
		}
		public StemDO(StemDO obj) : this()
		{
		    SetValues(obj);
		}