我使用Camel Main组件版本3.19，通过以下YAML DSL路由成功地将文件从AWS/S3存储桶加载到本地文件系统：

- beans:
    - name: IdempotentRepositoryBean
      type: org.apache.camel.support.processor.idempotent.MemoryIdempotentRepository

- route:
    from:
      uri: "aws2-s3:arn:aws:s3:someBucket"
      parameters:
        # The AWS region hosting the bucket and the access credentials
        # are obtained from Properties file.
        amazonS3Client: "#awss3SourceClient"
        deleteAfterRead: "false"
      steps:
        - idempotent-consumer:
            idempotent-repository: "IdempotentRepositoryBean"
            header: "CamelAwsS3Key"
            skip-duplicate: true
        - set-header:
            name: "CamelFileName"
            simple: "${header.CamelAwsS3Key}"
        - to:
            uri: "file:C:/..."

但是，除了报头CamelAwsS3Key之外，我还希望包含报头CamelAwsS3LastModified，以确保在此路由运行时不会跳过在S3上更新的文件。使用Java DSL中的等效路由并附加密钥CamelAwsS3LastModified（如下所示）可以很好地工作：

route = from(fromEndpoint).
             idempotentConsumer(header("CamelAwsS3Key").
                  append(header("CamelAwsS3LastModified")), idempotentRepository);

如何以与上述YAML DSL路由相同的方式将组合的header定义为idempotent-consumer规范的一部分？