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diff --git a/src/dotnet-library/scala/collection/mutable/MapProxy.scala b/src/dotnet-library/scala/collection/mutable/MapProxy.scala
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+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2006, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id$
+
+
+package scala.collection.mutable
+
+
+/** <p>
+ *    This is a simple wrapper class for <a href="Map.html"
+ *    target="contentFrame"><code>scala.collection.mutable.Map</code></a>.
+ *  </p>
+ *  <p>
+ *    It is most useful for assembling customized map abstractions
+ *    dynamically using object composition and forwarding.
+ *  </p>
+ *
+ *  @author  Matthias Zenger
+ *  @author  Martin Odersky
+ *  @version 2.0, 31/12/2006
+ */
+trait MapProxy[A, B] extends Map[A, B] with collection.MapProxy[A, B] {
+
+  def self: Map[A, B]
+
+  override def update(key: A, value: B): Unit = self.update(key, value)
+  override def += (kv: {A, B}) = self += kv
+  override def += (kv1: {A, B}, kv2: {A, B}, kvs: {A, B}*) = self.+=(kv1, kv2, kvs: _*)
+  override def ++= (kvs: Iterable[{A, B}]) = self ++= kvs
+  override def ++= (kvs: Iterator[{A, B}]) = self ++= kvs
+  override def + (kv: {A, B}): Map[A, B] = self + kv
+  override def + (kv1: {A, B}, kv2: {A, B}, kvs: {A, B}*): Map[A, B] = self.+(kv1, kv2, kvs: _*)
+  override def ++ (kvs: Iterable[{A, B}]): Map[A, B] = self ++ kvs
+  override def ++ (kvs: Iterator[{A, B}]): Map[A, B] = self ++ kvs
+  override def -= (key: A) = self -= key
+  override def -= (key1: A, key2: A, keys: A*) = self.-=(key1, key2, keys: _*)
+  override def --= (keys: Iterable[A]) = self --= keys
+  override def --= (keys: Iterator[A]) = self --= keys
+  override def - (key: A): Map[A, B] = self - key
+  override def - (key1: A, key2: A, keys: A*): Map[A, B] = self.-(key1, key2, keys: _*)
+  override def -- (keys: Iterable[A]): Map[A, B] = self -- keys
+  override def -- (keys: Iterator[A]): Map[A, B] = self -- keys
+  override def clear(): Unit = self.clear
+  override def transform(f: (A, B) => B) = self transform f
+  override def retain(p: (A, B) => Boolean): Unit = self retain p
+  override def <<(cmd: Message[{A, B}]): Unit = self << cmd
+  override def clone(): Map[A, B] = self.clone()
+  [deprecated] override def incl(mappings: {A, B}*): Unit = self.incl(mappings: _*)
+  [deprecated] override def excl(keys: A*): Unit = self.excl(keys: _*)
+}