code: @Override
      public void introspect(PrintWriter out) throws Exception {
          for (Region region : digraph) {
              out.println(region.getName());
              out.println("  Associated Bundles:");
              for (Long id : region.getBundleIds()) {
                  Bundle b = systemContext.getBundle(id);
                  out.append("    ");
                  out.println(b);
              }
              out.println("  Edges:");
              for (FilteredRegion edge : region.getEdges()) {
                  out.append("    ").append(edge.getRegion().getName()).append(" -> ");
                  out.println(edge.getFilter());
              }
              out.println();
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.wsspi.logging.Introspector#introspect(java.io.PrintWriter)