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diff --git a/guava/src/com/google/common/collect/ForwardingNavigableSet.java b/guava/src/com/google/common/collect/ForwardingNavigableSet.java
deleted file mode 100644
index dff5ea0..0000000
--- a/guava/src/com/google/common/collect/ForwardingNavigableSet.java
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@@ -1,238 +0,0 @@
-/*
- * Copyright (C) 2012 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.Beta;
-
-import java.util.Iterator;
-import java.util.NavigableSet;
-import java.util.SortedSet;
-
-/**
- * A navigable set which forwards all its method calls to another navigable set. Subclasses should
- * override one or more methods to modify the behavior of the backing set as desired per the <a
- * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
- *
- * <p><i>Warning:</i> The methods of {@code ForwardingNavigableSet} forward <i>indiscriminately</i>
- * to the methods of the delegate. For example, overriding {@link #add} alone <i>will not</i>
- * change the behavior of {@link #addAll}, which can lead to unexpected behavior. In this case, you
- * should override {@code addAll} as well, either providing your own implementation, or delegating
- * to the provided {@code standardAddAll} method.
- *
- * <p>Each of the {@code standard} methods uses the set's comparator (or the natural ordering of
- * the elements, if there is no comparator) to test element equality. As a result, if the
- * comparator is not consistent with equals, some of the standard implementations may violate the
- * {@code Set} contract.
- *
- * <p>The {@code standard} methods and the collection views they return are not guaranteed to be
- * thread-safe, even when all of the methods that they depend on are thread-safe.
- *
- * @author Louis Wasserman
- * @since 12.0
- */
-public abstract class ForwardingNavigableSet<E>
-    extends ForwardingSortedSet<E> implements NavigableSet<E> {
-
-  /** Constructor for use by subclasses. */
-  protected ForwardingNavigableSet() {}
-
-  @Override
-  protected abstract NavigableSet<E> delegate();
-
-  @Override
-  public E lower(E e) {
-    return delegate().lower(e);
-  }
-
-  /**
-   * A sensible definition of {@link #lower} in terms of the {@code descendingIterator} method of
-   * {@link #headSet(Object, boolean)}. If you override {@link #headSet(Object, boolean)}, you may
-   * wish to override {@link #lower} to forward to this implementation.
-   */
-  protected E standardLower(E e) {
-    return Iterators.getNext(headSet(e, false).descendingIterator(), null);
-  }
-
-  @Override
-  public E floor(E e) {
-    return delegate().floor(e);
-  }
-
-  /**
-   * A sensible definition of {@link #floor} in terms of the {@code descendingIterator} method of
-   * {@link #headSet(Object, boolean)}. If you override {@link #headSet(Object, boolean)}, you may
-   * wish to override {@link #floor} to forward to this implementation.
-   */
-  protected E standardFloor(E e) {
-    return Iterators.getNext(headSet(e, true).descendingIterator(), null);
-  }
-
-  @Override
-  public E ceiling(E e) {
-    return delegate().ceiling(e);
-  }
-
-  /**
-   * A sensible definition of {@link #ceiling} in terms of the {@code iterator} method of
-   * {@link #tailSet(Object, boolean)}. If you override {@link #tailSet(Object, boolean)}, you may
-   * wish to override {@link #ceiling} to forward to this implementation.
-   */
-  protected E standardCeiling(E e) {
-    return Iterators.getNext(tailSet(e, true).iterator(), null);
-  }
-
-  @Override
-  public E higher(E e) {
-    return delegate().higher(e);
-  }
-
-  /**
-   * A sensible definition of {@link #higher} in terms of the {@code iterator} method of
-   * {@link #tailSet(Object, boolean)}. If you override {@link #tailSet(Object, boolean)}, you may
-   * wish to override {@link #higher} to forward to this implementation.
-   */
-  protected E standardHigher(E e) {
-    return Iterators.getNext(tailSet(e, false).iterator(), null);
-  }
-
-  @Override
-  public E pollFirst() {
-    return delegate().pollFirst();
-  }
-
-  /**
-   * A sensible definition of {@link #pollFirst} in terms of the {@code iterator} method. If you
-   * override {@link #iterator} you may wish to override {@link #pollFirst} to forward to this
-   * implementation.
-   */
-  protected E standardPollFirst() {
-    return Iterators.pollNext(iterator());
-  }
-
-  @Override
-  public E pollLast() {
-    return delegate().pollLast();
-  }
-
-  /**
-   * A sensible definition of {@link #pollLast} in terms of the {@code descendingIterator} method.
-   * If you override {@link #descendingIterator} you may wish to override {@link #pollLast} to
-   * forward to this implementation.
-   */
-  protected E standardPollLast() {
-    return Iterators.pollNext(descendingIterator());
-  }
-
-  protected E standardFirst() {
-    return iterator().next();
-  }
-
-  protected E standardLast() {
-    return descendingIterator().next();
-  }
-
-  @Override
-  public NavigableSet<E> descendingSet() {
-    return delegate().descendingSet();
-  }
-
-  /**
-   * A sensible implementation of {@link NavigableSet#descendingSet} in terms of the other methods
-   * of {@link NavigableSet}, notably including {@link NavigableSet#descendingIterator}.
-   *
-   * <p>In many cases, you may wish to override {@link ForwardingNavigableSet#descendingSet} to
-   * forward to this implementation or a subclass thereof.
-   *
-   * @since 12.0
-   */
-  @Beta
-  protected class StandardDescendingSet extends Sets.DescendingSet<E> {
-    /** Constructor for use by subclasses. */
-    public StandardDescendingSet() {
-      super(ForwardingNavigableSet.this);
-    }
-  }
-
-  @Override
-  public Iterator<E> descendingIterator() {
-    return delegate().descendingIterator();
-  }
-
-  @Override
-  public NavigableSet<E> subSet(
-      E fromElement,
-      boolean fromInclusive,
-      E toElement,
-      boolean toInclusive) {
-    return delegate().subSet(fromElement, fromInclusive, toElement, toInclusive);
-  }
-
-  /**
-   * A sensible definition of {@link #subSet(Object, boolean, Object, boolean)} in terms of the
-   * {@code headSet} and {@code tailSet} methods. In many cases, you may wish to override
-   * {@link #subSet(Object, boolean, Object, boolean)} to forward to this implementation.
-   */
-  @Beta
-  protected NavigableSet<E> standardSubSet(
-      E fromElement,
-      boolean fromInclusive,
-      E toElement,
-      boolean toInclusive) {
-    return tailSet(fromElement, fromInclusive).headSet(toElement, toInclusive);
-  }
-
-  /**
-   * A sensible definition of {@link #subSet(Object, Object)} in terms of the
-   * {@link #subSet(Object, boolean, Object, boolean)} method. If you override
-   * {@link #subSet(Object, boolean, Object, boolean)}, you may wish to override
-   * {@link #subSet(Object, Object)} to forward to this implementation.
-   */
-  @Override
-  protected SortedSet<E> standardSubSet(E fromElement, E toElement) {
-    return subSet(fromElement, true, toElement, false);
-  }
-
-  @Override
-  public NavigableSet<E> headSet(E toElement, boolean inclusive) {
-    return delegate().headSet(toElement, inclusive);
-  }
-
-  /**
-   * A sensible definition of {@link #headSet(Object)} in terms of the
-   * {@link #headSet(Object, boolean)} method. If you override
-   * {@link #headSet(Object, boolean)}, you may wish to override
-   * {@link #headSet(Object)} to forward to this implementation.
-   */
-  protected SortedSet<E> standardHeadSet(E toElement) {
-    return headSet(toElement, false);
-  }
-
-  @Override
-  public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
-    return delegate().tailSet(fromElement, inclusive);
-  }
-
-  /**
-   * A sensible definition of {@link #tailSet(Object)} in terms of the
-   * {@link #tailSet(Object, boolean)} method. If you override
-   * {@link #tailSet(Object, boolean)}, you may wish to override
-   * {@link #tailSet(Object)} to forward to this implementation.
-   */
-  protected SortedSet<E> standardTailSet(E fromElement) {
-    return tailSet(fromElement, true);
-  }
-}