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package org.pcollections;
import java.util.Collection;
import java.util.LinkedHashSet;
/**
* Like {@link PSet} but preserves insertion order. Persistent equivalent of
* {@link LinkedHashSet}.
*
* @author Tassilo Horn <[email protected]>
*
* @param
*/
public interface POrderedSet extends PSet {
public POrderedSet plus(E e);
public POrderedSet plusAll(Collection list);
public POrderedSet minus(Object e);
public POrderedSet minusAll(Collection list);
E get(int index);
int indexOf(Object o);
}