/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Return a simple string to
 * confirm this function has been visited.
 *
 * @param visited the visited function list
 */
function main(params) {
    functionID = params.functionID || 'X'
    if (params.visited == null) {
        params.visited = 'function'+functionID;
    } else {
        params.visited = params.visited + ', function'+functionID;
    }
    return {"visited":params.visited};
}