In [1]: from swh.storage.tests import storage_data as sd
In [2]: set(sd.StorageData.git_revisions)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-11-45b8523ac10c> in <module>
----> 1 set(sd.StorageData.git_revisions)

<attrs generated hash swh.model.model.Revision> in __hash__(self)
      1 def __hash__(self):
----> 2         return hash((
      3                 2836558187653566397,
      4                 self.message,
      5                 self.author,

~/swh/swh-environment/swh-model/swh/model/collections.py in __hash__(self)
     47 
     48     def __hash__(self):
---> 49         return hash(tuple(sorted(self.data)))
     50 
     51     def copy_pop(self, popped_key) -> Tuple[Optional[VT], "ImmutableDict[KT, VT]"]:

TypeError: unhashable type: 'dict'