public UserMatch withSimilarity(Float similarity) {
        setSimilarity(similarity);
        return this;
    }
<p>
Describes the UserID metadata.
</p>

@param similarity
       Describes the UserID metadata.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/UserMatch.java