'Unique identifier for the transformer\'s class. It is used to
identify the transformer\'s cached data. So it should be unique
and not conflict with other transformers. Consider using the
same name that is used in the Transformer Registry. For example,
for Stevedore, it is specified in the setup.py file.
Once the transformer is in use and its data is cached, do not
modify this name value without consideration of backward
compatibility with previously collected data.'

@classmethod
def name(cls):

    raise NotImplementedError
