docs: def normal_cover(self, minAcc, maxAcc, groupBy=None, new_reg_fields=None):
          """
          *Wrapper of* ``COVER``
  
          The normal cover operation as described in :meth:`~.cover`.
          Equivalent to calling::
          
              dataset.cover("normal", ...)
          """
          return self.cover(minAcc, maxAcc, groupBy, new_reg_fields, cover_type="normal")