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

@return Optional. The Amazon Resource Name (ARN) of the user or identity for which you want to get reaction
        information.
aws-java-sdk-codecommit/src/main/java/com/amazonaws/services/codecommit/model/GetCommentReactionsRequest.java