private static List<PsiAnnotation> getAllMixins(PsiModifierList modifierList) {
    final ArrayList<PsiAnnotation> result = new ArrayList<>();
    for (PsiAnnotation annotation : modifierList.getAnnotations()) {
      if (GroovyCommonClassNames.GROOVY_LANG_MIXIN.equals(annotation.getQualifiedName())) {
        result.add(annotation);
      }
    }
    return result;
  }
private static List<PsiAnnotation> getAllMixins(PsiModifierList modifierList)