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diff --git a/src/proguard/classfile/visitor/MethodImplementationFilter.java b/src/proguard/classfile/visitor/MethodImplementationFilter.java
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+++ b/src/proguard/classfile/visitor/MethodImplementationFilter.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.visitor;
+
+import proguard.classfile.*;
+import proguard.classfile.util.SimplifiedVisitor;
+
+/**
+ * This <code>MemberVisitor</code> delegates its visits to methods to
+ * another given <code>MemberVisitor</code>, but only when the visited
+ * method may have implementations.
+ *
+ * @see Clazz#mayHaveImplementations(Method)
+ * @author Eric Lafortune
+ */
+public class MethodImplementationFilter
+extends      SimplifiedVisitor
+implements   MemberVisitor
+{
+    private final MemberVisitor memberVisitor;
+
+
+    /**
+     * Creates a new MethodImplementationFilter.
+     * @param memberVisitor     the <code>MemberVisitor</code> to which
+     *                          visits will be delegated.
+     */
+    public MethodImplementationFilter(MemberVisitor memberVisitor)
+    {
+        this.memberVisitor = memberVisitor;
+    }
+
+
+    // Implementations for MemberVisitor.
+
+    public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
+    {
+        if (programClass.mayHaveImplementations(programMethod))
+        {
+            memberVisitor.visitProgramMethod(programClass, programMethod);
+        }
+    }
+
+
+    public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
+    {
+        if (libraryClass.mayHaveImplementations(libraryMethod))
+        {
+            memberVisitor.visitLibraryMethod(libraryClass, libraryMethod);
+        }
+    }
+}