src/main/org/apache/ant/compress/resources/CommonsCompressCompressorResource.java [91:106]:
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    public void setDecompressConcatenated(boolean b) {
        if (!b || factory instanceof CompressorWithConcatenatedStreamsFactory) {
            decompressConcatenated = b;
        } else {
            throw new BuildException("concatenated streams are not supported"
                                     + "by this compression format.");
        }
    }

    /**
     * Decompress on the fly.
     * @param in the stream to wrap.
     * @return the wrapped stream.
     * @throws IOException if there is a problem.
     */
    @Override
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src/main/org/apache/ant/compress/taskdefs/UnpackBase.java [82:94]:
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    public void setDecompressConcatenated(boolean b) {
        if (!b || factory instanceof CompressorWithConcatenatedStreamsFactory) {
            decompressConcatenated = b;
        } else {
            throw new BuildException("concatenated streams are not supported"
                                     + "by this compression format.");
        }
    }

    /**
     * Implement the uncompression.
     */
    @Override
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