public AssociateFacesRequest withUserMatchThreshold(Float userMatchThreshold) {
        setUserMatchThreshold(userMatchThreshold);
        return this;
    }
<p>
An optional value specifying the minimum confidence in the UserID match to return. The default value is 75.
</p>

@param userMatchThreshold
       An optional value specifying the minimum confidence in the UserID match to return. The default value is
       75.
@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/AssociateFacesRequest.java