def _create_exif_uuid(self, endian):
b = BytesIO()<EOL>b.write(struct.pack('<STR_LIT>', <NUM_LIT>, b'<STR_LIT>'))<EOL>b.write(b'<STR_LIT>')<EOL>b.write(b'<STR_LIT>')<EOL>buffer = self._create_degenerate_geotiff(endian)<EOL>b.write(buffer)<EOL>b.seek(<NUM_LIT:8>)<EOL>return b<EOL>
Create a buffer that can be parsed as an Exif UUID.

Parameters
----------
endian : str
    Either '<' for little endian or '>' for big endian