public UploadPartRequest withUploadId(String uploadId) {
        this.uploadId = uploadId;
        return this;
    }
Sets the ID of the existing, initiated multipart upload with which this
new part will be associated, and returns this updated UploadPartRequest
object so that additional method calls can be chained together.

@param uploadId
           the ID of the existing, initiated multipart upload with which
           this new part will be associated.

@return This updated UploadPartRequest object.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/UploadPartRequest.java