src/com/facebook/buck/dalvik/DalvikAwareOutputStreamHelper.java [83:97]:
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  @Override
  public boolean containsEntry(FileLike fileLike) {
    return entryNames.contains(fileLike.getRelativePath());
  }

  @Override
  public void putEntry(FileLike fileLike) throws IOException {
    String name = fileLike.getRelativePath();
    // Tracks unique entry names and avoids duplicates.  This is, believe it or not, how
    // proguard seems to handle merging multiple -injars into a single -outjar.
    if (!containsEntry(fileLike)) {
      entryNames.add(name);
      outStream.putNextEntry(new ZipEntry(name));
      try (InputStream in = fileLike.getInput()) {
        ByteStreams.copy(in, outStream);
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src/com/facebook/buck/dalvik/DefaultZipOutputStreamHelper.java [74:88]:
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  @Override
  public boolean containsEntry(FileLike fileLike) {
    return entryNames.contains(fileLike.getRelativePath());
  }

  @Override
  public void putEntry(FileLike fileLike) throws IOException {
    String name = fileLike.getRelativePath();
    // Tracks unique entry names and avoids duplicates.  This is, believe it or not, how
    // proguard seems to handle merging multiple -injars into a single -outjar.
    if (!containsEntry(fileLike)) {
      entryNames.add(name);
      outStream.putNextEntry(new ZipEntry(name));
      try (InputStream in = fileLike.getInput()) {
        ByteStreams.copy(in, outStream);
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