public void setUserIdsToAdd(java.util.Collection<String> userIdsToAdd) {
        if (userIdsToAdd == null) {
            this.userIdsToAdd = null;
            return;
        }

        this.userIdsToAdd = new com.amazonaws.internal.SdkInternalList<String>(userIdsToAdd);
    }
<p>
The list of user IDs to add.
</p>

@param userIdsToAdd
       The list of user IDs to add.
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/UserGroupPendingChanges.java