public GetCommentReactionsRequest withReactionUserArn(String reactionUserArn) {
        setReactionUserArn(reactionUserArn);
        return this;
    }
<p>
Optional. The Amazon Resource Name (ARN) of the user or identity for which you want to get reaction information.
</p>

@param reactionUserArn
       Optional. The Amazon Resource Name (ARN) of the user or identity for which you want to get reaction
       information.
@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/GetCommentReactionsRequest.java