diff --git a/src/test/examples/multidex002/fakelibrary/MultiDexExtractor.java b/src/test/examples/multidex002/fakelibrary/MultiDexExtractor.java
new file mode 100644
index 0000000..b80fcc8
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+++ b/src/test/examples/multidex002/fakelibrary/MultiDexExtractor.java
@@ -0,0 +1,141 @@
+// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package multidex002.fakelibrary;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileFilter;
+import java.io.IOException;
+import java.util.List;
+import multidexfakeframeworks.Context;
+
+/**
+ * Exposes application secondary dex files as files in the application data
+ * directory.
+ */
+final class MultiDexExtractor {
+
+    private static final String TAG = MultiDex.TAG;
+
+    /**
+     * We look for additional dex files named {@code classes2.dex},
+     * {@code classes3.dex}, etc.
+     */
+    private static final String DEX_PREFIX = "classes";
+    private static final String DEX_SUFFIX = ".dex";
+
+    private static final String EXTRACTED_NAME_EXT = ".classes";
+    private static final String EXTRACTED_SUFFIX = ".zip";
+    private static final int MAX_EXTRACT_ATTEMPTS = 3;
+
+    private static final String PREFS_FILE = "multidex.version";
+    private static final String KEY_TIME_STAMP = "timestamp";
+    private static final String KEY_CRC = "crc";
+    private static final String KEY_DEX_NUMBER = "dex.number";
+
+    /**
+     * Size of reading buffers.
+     */
+    private static final int BUFFER_SIZE = 0x4000;
+    /* Keep value away from 0 because it is a too probable time stamp value */
+    private static final long NO_VALUE = -1L;
+
+
+    private static List<File> loadExistingExtractions(Context context, File sourceApk, File dexDir)
+            throws IOException {
+
+        final String extractedFilePrefix = sourceApk.getName() + EXTRACTED_NAME_EXT;
+        int totalDexNumber = 1;
+        final List<File> files = null;
+
+        for (int secondaryNumber = 2; secondaryNumber <= totalDexNumber; secondaryNumber++) {
+            String fileName = extractedFilePrefix + secondaryNumber + EXTRACTED_SUFFIX;
+            File extractedFile = new File(dexDir, fileName);
+            if (extractedFile.isFile()) {
+                files.add(extractedFile);
+            } else {
+                throw new IOException("Missing extracted secondary dex file '" +
+                        extractedFile.getPath() + "'");
+            }
+        }
+
+        return files;
+    }
+
+    private static long getTimeStamp(File archive) {
+        long timeStamp = archive.lastModified();
+        if (timeStamp == NO_VALUE) {
+            // never return NO_VALUE
+            timeStamp--;
+        }
+        return timeStamp;
+    }
+
+
+    private static long getZipCrc(File archive) throws IOException {
+        long computedValue = ZipUtil.getZipCrc(archive);
+        if (computedValue == NO_VALUE) {
+            // never return NO_VALUE
+            computedValue--;
+        }
+        return computedValue;
+    }
+
+    private static List<File> performExtractions(File sourceApk, File dexDir)
+            throws IOException {
+
+        final String extractedFilePrefix = sourceApk.getName() + EXTRACTED_NAME_EXT;
+
+        // Ensure that whatever deletions happen in prepareDexDir only happen if the zip that
+        // contains a secondary dex file in there is not consistent with the latest apk.  Otherwise,
+        // multi-process race conditions can cause a crash loop where one process deletes the zip
+        // while another had created it.
+        prepareDexDir(dexDir, extractedFilePrefix);
+
+        List<File> files = null;
+
+        return files;
+    }
+
+    /**
+     * This removes any files that do not have the correct prefix.
+     */
+    private static void prepareDexDir(File dexDir, final String extractedFilePrefix)
+            throws IOException {
+        dexDir.mkdir();
+        if (!dexDir.isDirectory()) {
+            throw new IOException("Failed to create dex directory " + dexDir.getPath());
+        }
+
+        // Clean possible old files
+        FileFilter filter = new FileFilter() {
+
+            @Override
+            public boolean accept(File pathname) {
+                return !pathname.getName().startsWith(extractedFilePrefix);
+            }
+        };
+        File[] files = dexDir.listFiles(filter);
+        if (files == null) {
+            return;
+        }
+        for (File oldFile : files) {
+            if (!oldFile.delete()) {
+            } else {
+            }
+        }
+    }
+
+    /**
+     * Closes the given {@code Closeable}. Suppresses any IO exceptions.
+     */
+    private static void closeQuietly(Closeable closeable) {
+        try {
+            closeable.close();
+        } catch (IOException e) {
+        }
+    }
+
+}