docs: def get_available_name(self, name, max_length=None):
          """Return relative path to name placed in random directory"""
          tempdir = tempfile.mkdtemp(dir=self.base_location)
          name = os.path.join(
              os.path.basename(tempdir),
              os.path.basename(name),
          )
          method = super(TempFileSystemStorage, self).get_available_name
          return method(name, max_length=max_length)