public UserUnion withUserArn(String userArn) {
        setUserArn(userArn);
        return this;
    }
<p>
Represents the Amazon Connect ARN of the user.
</p>

@param userArn
       Represents the Amazon Connect ARN of the user.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-connectcases/src/main/java/com/amazonaws/services/connectcases/model/UserUnion.java