/* (non-Javadoc)
  * @see java.lang.Object#equals(java.lang.Object)
  */
 @Override
 public boolean equals(Object obj) {
   if (this == obj) return true;
   if (obj == null) return false;
   if (!(obj instanceof GridSectionTemp)) return false;
   GridSectionTemp other = (GridSectionTemp) obj;
   if (coordinates == null) {
     if (other.coordinates != null) return false;
   } else if (!coordinates.equals(other.coordinates)) return false;
   return true;
 }