public static boolean isMemberBetween(PsiClass superClass, PsiClass subClass, PsiMember member) {
    PsiClass elementClass = null;
    if (member instanceof PsiField || member instanceof PsiMethod) {
      elementClass = member.getContainingClass();
    }

    if (elementClass == null) return false;
    if (superClass != null) {
      if (elementClass.isInheritor(superClass, true)) {
        return !superClass.getManager().areElementsEquivalent(superClass, elementClass);
      }
      return PsiTreeUtil.isAncestor(elementClass, subClass, false) && !PsiTreeUtil.isAncestor(elementClass, superClass, false);
    }
    else {
      return subClass.getManager().areElementsEquivalent(subClass, elementClass);
    }
  }
public static boolean isMemberBetween(PsiClass superClass, PsiClass subClass, PsiMember member)