docs: def histogram_cover(self, minAcc, maxAcc, groupBy=None, new_reg_fields=None):
          """
          *Wrapper of* ``COVER``
  
          Variant of the function :meth:`~.cover` that returns all regions contributing to 
          the COVER divided in different (contiguous) parts according to their accumulation 
          index value (one part for each different accumulation value), which is assigned to 
          the AccIndex region attribute.
          
          Equivalent to calling::
          
              cover("histogram", ...)
          """
          return self.cover(minAcc, maxAcc, groupBy, new_reg_fields, cover_type="histogram")