private static boolean hasNonInvertedCalls(final RefMethod refMethod) {
   final Boolean alwaysInverted = refMethod.getUserData(ALWAYS_INVERTED);
   if (alwaysInverted == null) return true;
   if (refMethod.isExternalOverride()) return true;
   if (refMethod.isReferenced() && !alwaysInverted.booleanValue()) return true;
   final Collection<RefMethod> superMethods = refMethod.getSuperMethods();
   for (RefMethod superMethod : superMethods) {
     if (hasNonInvertedCalls(superMethod)) return true;
   }
   return false;
 }
  @Nullable
  public CommonProblemDescriptor[] checkElement(
      final RefEntity refEntity,
      final AnalysisScope scope,
      final InspectionManager manager,
      final GlobalInspectionContext globalContext,
      final ProblemDescriptionsProcessor processor) {
    if (refEntity instanceof RefMethod) {
      final RefMethod refMethod = (RefMethod) refEntity;

      if (refMethod.isSyntheticJSP()) return null;

      if (refMethod.isExternalOverride()) return null;

      if (!(refMethod.isStatic() || refMethod.isConstructor())
          && !refMethod.getSuperMethods().isEmpty()) return null;

      if ((refMethod.isAbstract() || refMethod.getOwnerClass().isInterface())
          && refMethod.getDerivedMethods().isEmpty()) return null;

      if (RefUtil.isEntryPoint(refMethod)) return null;

      if (refMethod.isAppMain()) return null;

      final ArrayList<RefParameter> unusedParameters = getUnusedParameters(refMethod);

      if (unusedParameters.isEmpty()) return null;

      final List<ProblemDescriptor> result = new ArrayList<ProblemDescriptor>();
      for (RefParameter refParameter : unusedParameters) {
        final PsiIdentifier psiIdentifier = refParameter.getElement().getNameIdentifier();
        if (psiIdentifier != null) {
          result.add(
              manager.createProblemDescriptor(
                  psiIdentifier,
                  refMethod.isAbstract()
                      ? InspectionsBundle.message("inspection.unused.parameter.composer")
                      : InspectionsBundle.message("inspection.unused.parameter.composer1"),
                  new AcceptSuggested(
                      globalContext.getRefManager(), processor, refParameter.toString()),
                  ProblemHighlightType.LIKE_UNUSED_SYMBOL,
                  false));
        }
      }
      return result.toArray(new CommonProblemDescriptor[result.size()]);
    }
    return null;
  }
  @Override
  @Nullable
  public CommonProblemDescriptor[] checkElement(
      @NotNull final RefEntity refEntity,
      @NotNull final AnalysisScope scope,
      @NotNull final InspectionManager manager,
      @NotNull final GlobalInspectionContext globalContext,
      @NotNull final ProblemDescriptionsProcessor processor) {
    if (refEntity instanceof RefJavaElement) {
      final RefJavaElement refElement = (RefJavaElement) refEntity;

      if (refElement instanceof RefParameter) return null;
      if (refElement.isSyntheticJSP()) return null;

      // ignore entry points.
      if (refElement.isEntry()) return null;

      // ignore implicit constructors. User should not be able to see them.
      if (refElement instanceof RefImplicitConstructor) return null;

      if (refElement instanceof RefField
          && ((RefField) refElement).getElement() instanceof PsiEnumConstant) return null;

      // ignore library override methods.
      if (refElement instanceof RefMethod) {
        RefMethod refMethod = (RefMethod) refElement;
        if (refMethod.isExternalOverride()) return null;
        if (refMethod.isEntry()) return null;
      }

      // ignore anonymous classes. They do not have access modifiers.
      if (refElement instanceof RefClass) {
        RefClass refClass = (RefClass) refElement;
        if (refClass.isAnonymous()
            || refClass.isEntry()
            || refClass.isTestCase()
            || refClass.isServlet()
            || refClass.isApplet()
            || refClass.isLocalClass()) return null;
        if (isTopLevelClass(refClass) && !SUGGEST_PACKAGE_LOCAL_FOR_TOP_CLASSES) return null;
      }

      // ignore unreferenced code. They could be a potential entry points.
      if (refElement.getInReferences().isEmpty()) return null;

      // ignore interface members. They always have public access modifier.
      if (refElement.getOwner() instanceof RefClass) {
        RefClass refClass = (RefClass) refElement.getOwner();
        if (refClass.isInterface()) return null;
      }
      String access = getPossibleAccess(refElement);
      if (access != refElement.getAccessModifier() && access != null) {
        final PsiElement element = refElement.getElement();
        final PsiElement nameIdentifier =
            element != null ? HighlightUsagesHandler.getNameIdentifier(element) : null;
        if (nameIdentifier != null) {
          return new ProblemDescriptor[] {
            manager.createProblemDescriptor(
                nameIdentifier,
                access.equals(PsiModifier.PRIVATE)
                    ? CAN_BE_PRIVATE
                    : access.equals(PsiModifier.PACKAGE_LOCAL)
                        ? CAN_BE_PACKAGE_LOCAL
                        : CAN_BE_PROTECTED,
                new AcceptSuggestedAccess(globalContext.getRefManager(), access),
                ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
                false)
          };
        }
      }
    }
    return null;
  }