如何将AutoValue Builder作为参数传递给AutoValue Builder&#39；s set（）方法（不自己定义方法）

我有一个带有属性SubMessage的AutoValue，也是一个AutoValue。顶层AutoValue有一个Builder，允许您使用set(SubMessage)设置AutoValueSubMessage属性。然而，当我声明set(SubMessage.Builder)时，会出现编译错误。但是，由于get()返回SubMessage而不是SubMessage.Builder，因此存在编译错误。我做得不对吗？有什么建议吗？

值得注意的是，我试图避免定义这样的非抽象方法：

public MainMessage.Builder setSubMessage(SubMessage.Builder builder) {
  setSubMessage(builder.build());
  return this;
}

AutoValue的目标之一是删除尽可能多的样板，这就是为什么我试图弄清楚AutoValue是否会自动生成我需要的代码。

示例如下：

@AutoValue
  public abstract static class MainMessage {

    public static Builder builder() {
      return new AutoValue_MainClass_MainMessage.Builder();
    }

    public abstract SubMessage subMessage();

    public abstract Builder toBuilder();

    /** Builder for MainMessage. */
    @AutoValue.Builder
    public abstract static class Builder {

      public abstract Builder setSubMessage(SubMessage value);

      public abstract Builder setSubMessage(SubMessage.Builder value);

      public abstract SubMessage.Builder subMessageBuilder();

      public abstract MainMessage build();
    }
  }

  @AutoValue
  public abstract static class SubMessage {

    public static Builder builder() {
      return new AutoValue_MainClass_SubMessage.Builder();
    }

    public abstract int someValue();

    public abstract Builder toBuilder();

    /** Builder for SubMessage. */
    @AutoValue.Builder
    public abstract static class Builder {

      public abstract Builder setSomeValue(int value);

      public abstract SubMessage build();
    }
  }

错误：

[AutoValueGetVsSet] Parameter type MainClass.SubMessage.Builder of setter method should be com.google.sandbox.MainClass.SubMessage to match property method com.google.sandbox.MainClass.MainMessage.subMessage()
      public abstract Builder setSubMessage(SubMessage.Builder value);