public static @Nullable PsiClass findCommonSuperClass(PsiClassType... types) {
    if (types.length == 0) {
      return null;
    }
    final PsiClass firstClass = types[0].resolve();
    if (firstClass == null || types.length == 1) {
      return firstClass;
    }
    Set<PsiClass> sourceSet = new HashSet<>();
    PsiClass aClass = firstClass;
    while (aClass != null) {
      sourceSet.add(aClass);
      aClass = aClass.getSuperClass();
    }
    if (sourceSet.isEmpty()) {
      return null;
    }
    Set<PsiClass> targetSet = new HashSet<>();
    final int max = types.length - 1;
    for (int i = 1; i < max; i++) {
      final PsiClassType classType = types[i];
      PsiClass aClass1 = classType.resolve();
      while (aClass1 != null) {
        if (sourceSet.contains(aClass1)) {
          targetSet.add(aClass1);
        }
        aClass1 = aClass1.getSuperClass();
      }
      sourceSet = targetSet;
      targetSet = new HashSet<>();
    }
    PsiClass aClass1 = types[max].resolve();
    while (aClass1 != null && !sourceSet.contains(aClass1)) {
      aClass1 = aClass1.getSuperClass();
    }
    return aClass1;
  }
public static @Nullable PsiClass findCommonSuperClass(PsiClassType... types)