private static void prepareForInterface(PsiMethod method) {
    PsiUtil.setModifierProperty(method, PsiModifier.PUBLIC, false);
    PsiUtil.setModifierProperty(method, PsiModifier.PRIVATE, false);
    PsiUtil.setModifierProperty(method, PsiModifier.PROTECTED, false);
    prepareForAbstract(method);
  }
private static void prepareForInterface(PsiMethod method)