避免在ScalaPB编译器中使用内部类

Question

我有proto files，并使用ScalaPB生成了Scala类。 输出如下：

@SerialVersionUID(0L)
final case class MetaData extends scalapb.GeneratedMessage {

    object HeightReferencePointEnum extends _root_.scalapb.GeneratedEnumCompanion[HeightReferencePointEnum] {
      implicit def enumCompanion: _root_.scalapb.GeneratedEnumCompanion[HeightReferencePointEnum] = this
        // generated code
     }
  }

由于this Scala issue，在为getSimpleName类调用HeightReferencePointEnum时出现异常。

有什么方法可以配置ScalaPB以避免内部类？

消息原型为：

message MetaData {
    message HeightDetail {
        optional HeightReferencePointEnum heightReferencePoint = 1;
        enum HeightReferencePointEnum {
            // enums
        }
        optional heightReferencePointEnum heightReferencePoint = 2;
    }
    repeated HeightDetail heightDetail = 1;
}