public PostCommentForPullRequestResult withBeforeBlobId(String beforeBlobId) {
        setBeforeBlobId(beforeBlobId);
        return this;
    }
<p>
In the directionality of the pull request, the blob ID of the before blob.
</p>

@param beforeBlobId
       In the directionality of the pull request, the blob ID of the before blob.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-codecommit/src/main/java/com/amazonaws/services/codecommit/model/PostCommentForPullRequestResult.java