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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decode_source(source_bytes):
 """Decode bytes representing source code and return the string. Universal newline support is used in the decoding. """

    # source_bytes_readline = io.BytesIO(source_bytes).readline
    # encoding, _ = detect_encoding(source_bytes_readline)
    newline_decoder = io.IncrementalNewlineDecoder(None, True)
    return newline_decoder.decode(source_to_unicode(source_bytes))