/*
 * Copyright (C) 2009 The Guava Authors
 *
 * Licensed 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 com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

Implementation of ImmutableListMultimap with no entries.
Author:Mike Ward
/** * Implementation of {@link ImmutableListMultimap} with no entries. * * @author Mike Ward */
@GwtCompatible(serializable = true) class EmptyImmutableSetMultimap extends ImmutableSetMultimap<Object, Object> { static final EmptyImmutableSetMultimap INSTANCE = new EmptyImmutableSetMultimap(); private EmptyImmutableSetMultimap() { super(ImmutableMap.<Object, ImmutableSet<Object>>of(), 0, null); } private Object readResolve() { return INSTANCE; // preserve singleton property } private static final long serialVersionUID = 0; }