public UploadPartRequest withMD5Digest(String md5Digest) {
        this.md5Digest = md5Digest;
        return this;
    }
Sets the optional, but recommended, MD5 hash of the content of this part.
If specified, this value will be sent to Amazon S3 to verify the data
integrity when the data reaches Amazon S3.
<p>
Returns this updated UploadPartRequest object so that additional method
calls can be chained together.

@param md5Digest
           The optional, but recommended, MD5 hash of the content of this
           part. If specified, this value will be sent to Amazon S3 to
           verify the data integrity when the data reaches Amazon S3.

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