/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.
 */

package org.elasticsearch.client;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Header;

import java.io.IOException;
import java.util.Objects;

/**
 * High level REST client that wraps an instance of the low level {@link RestClient} and allows to build requests and read responses.
 * The provided {@link RestClient} is externally built and closed.
 */
public final class RestHighLevelClient {

    private static final Log logger = LogFactory.getLog(RestHighLevelClient.class);

    private final RestClient client;

    public RestHighLevelClient(RestClient client) {
        this.client = Objects.requireNonNull(client);
    }

    public boolean ping(Header... headers) {
        try {
            client.performRequest("HEAD", "/", headers);
            return true;
        } catch(IOException exception) {
            return false;
        }
    }
}

@@ -1701,10 +1701,12 @@
 %7D%0A    %7D%0A
+%0A%0A
 %7D%0A

Make RestHighLevelClient non final