code: @Override
    public boolean visit(final PackageNode node) {
      if (!node.getName().isEmpty()) {
        this.graphStr
            .append("  ")
            .append(node.getName())
            .append(" [label=\"")
            .append(node.getFullName())
            .append("\", shape=folder];\n");
      }
      return true;
    }
docs: Process current package configuration node.
  
  @param node Current configuration node.
  @return true to proceed with the next node, false to cancel.