@Override
    public @NotNull Iterator<JarInfo> getIn(final JarInfo n) {
      Set<JarInfo> ins = new HashSet<>();
      final DestinationInfo destination = n.getDestination();
      if (destination instanceof JarDestinationInfo) {
        ins.add(((JarDestinationInfo)destination).getJarInfo());
      }
      return ins.iterator();
    }
@Override
    public @NotNull Iterator<JarInfo> getIn(final JarInfo n)