retVal = y;
retVal = getY();
    public Spring getConstraint(String edgeName)    {      Spring retVal = null;      if (edgeName.equals(SpringLayout.NORTH))	retVal = y;      else if (edgeName.equals(SpringLayout.WEST))        retVal = x;      else if (edgeName.equals(SpringLayout.SOUTH))        {          retVal = south;	  if ((retVal == null) && (y != null) && (height != null))            retVal = Spring.sum(y, height);        }      else if (edgeName.equals(SpringLayout.EAST))        {          retVal = east;          if ((retVal == null) && (x != null) && (width != null))            retVal = Spring.sum(x, width);	}      return retVal;    }