@staticmethod<EOL><INDENT>def cf_data_to_bytes(value):<DEDENT>
start = CoreFoundation.CFDataGetBytePtr(value)<EOL>num_bytes = CoreFoundation.CFDataGetLength(value)<EOL>return string_at(start, num_bytes)<EOL>
Extracts a bytestring from a CFData object

:param value:
    A CFData object

:return:
    A byte string