branch : master , version : 2.7.0-SNAPSHOT
ServiceConfig#doExportUrlsFor1Protocol , line 482

<img width="890" alt="image" src="https://user-images.githubusercontent.com/6971152/41273922-035827c2-6e4e-11e8-8a72-71562d138cf9.png">

The type of Constant.SCOPE_Xxx is String already , no need to call toString() again
/*
 * 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
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package org.apache.dubbo.config;
import org.apache.dubbo.common.Constants;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.Version;
import org.apache.dubbo.common.bytecode.Wrapper;
import org.apache.dubbo.common.extension.ExtensionLoader;
import org.apache.dubbo.common.utils.ClassHelper;
import org.apache.dubbo.common.utils.ConfigUtils;