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A repackaged copy of javac for Error Prone to depend on

There is a newer version: 9-dev-r4023-3

/*
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.jshell;

/**
 * Grouping for Snippets which persist and influence future code.
 * A persistent snippet can be
 * {@linkplain jdk.jshell.Snippet.Status#OVERWRITTEN overwritten}
 * with new input.
 * 
 * PersistentSnippet is immutable: an access to
 * any of its methods will always return the same result.
 * and thus is thread-safe.
 *
 * @since 9
 */
public abstract class PersistentSnippet extends Snippet {

    PersistentSnippet(Key key, String userSource, Wrap guts, String unitName,
            SubKind subkind, DiagList syntheticDiags) {
        super(key, userSource, guts, unitName, subkind, syntheticDiags);
    }

    /**
     * Name of the Snippet.
     *
     * @return the name of the snippet.
     */
    @Override
    public String name() {
        return unitName;
    }
}