private void traverseToLeaves(final PackageDependenciesNode treeNode, final StringBuffer denyRules, final StringBuffer allowRules) {
    final Enumeration enumeration = treeNode.breadthFirstEnumeration();
    while (enumeration.hasMoreElements()) {
      PsiElement childPsiElement = ((PackageDependenciesNode)enumeration.nextElement()).getPsiElement();
      if (myIllegalDependencies.containsKey(childPsiElement)) {
        final Map<DependencyRule, Set<PsiFile>> illegalDeps = myIllegalDependencies.get(childPsiElement);
        for (final DependencyRule rule : illegalDeps.keySet()) {
          if (rule.isDenyRule()) {
            if (denyRules.indexOf(rule.getDisplayText()) == -1) {
              denyRules.append(rule.getDisplayText());
              denyRules.append("\n");
            }
          }
          else {
            if (allowRules.indexOf(rule.getDisplayText()) == -1) {
              allowRules.append(rule.getDisplayText());
              allowRules.append("\n");
            }
          }
        }
      }
    }
  }
private void traverseToLeaves(final PackageDependenciesNode treeNode, final StringBuffer denyRules, final StringBuffer allowRules)