https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar 
/*
 * Copyright (c) 2016 Goldman Sachs.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.lazy.parallel.set;

import org.eclipse.collections.api.annotation.Beta;
import org.eclipse.collections.api.block.function.Function;
import org.eclipse.collections.api.block.predicate.Predicate;
import org.eclipse.collections.impl.lazy.parallel.Batch;
import org.eclipse.collections.impl.lazy.parallel.bag.UnsortedBagBatch;

@Beta
public interface UnsortedSetBatch<T> extends Batch<T>
{
    @Override
    UnsortedSetBatch<T> select(Predicate<? super T> predicate);

    @Override
    <V> UnsortedBagBatch<V> collect(Function<? super T, ? extends V> function);

    @Override
    <V> UnsortedBagBatch<V> flatCollect(Function<? super T, ? extends Iterable<V>> function);
}