code: public static boolean same(Localizable a, Localizable b)
      {
          return Double.compare(a.getX(), b.getX()) == 0 && Double.compare(a.getY(), b.getY()) == 0;
      }
docs: Check if two localizable are at the same location.
  
  @param a The first localizable.
  @param b The second localizable.
  @return <code>true</code> if same location, <code>false</code> else.