@Override
    public void visitField(@NotNull PsiField field) {
      super.visitField(field);
      final PsiType type = field.getType();
      if (!type.equalsToText(CommonClassNames.JAVA_LANG_STRING_BUFFER) &&
          !type.equalsToText(CommonClassNames.JAVA_LANG_STRING_BUILDER)) {
        return;
      }
      registerFieldError(field, type);
    }
@Override
    public void visitField(@NotNull PsiField field)