public SearchUsersByImageResult withUserMatches(UserMatch... userMatches) {
        if (this.userMatches == null) {
            setUserMatches(new java.util.ArrayList<UserMatch>(userMatches.length));
        }
        for (UserMatch ele : userMatches) {
            this.userMatches.add(ele);
        }
        return this;
    }
<p>
An array of UserID objects that matched the input face, along with the confidence in the match. The returned
structure will be empty if there are no matches. Returned if the SearchUsersByImageResponse action is successful.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setUserMatches(java.util.Collection)} or {@link #withUserMatches(java.util.Collection)} if you want to
override the existing values.
</p>

@param userMatches
       An array of UserID objects that matched the input face, along with the confidence in the match. The
       returned structure will be empty if there are no matches. Returned if the SearchUsersByImageResponse
       action is successful.
@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/SearchUsersByImageResult.java