docs: def display_info(self):
          """Display basic information about the running MOC."""
  
          if self.moc is None:
              print('No MOC information present')
              return
  
          if self.moc.name is not None:
              print('Name:', self.moc.name)
          if self.moc.id is not None:
              print('Identifier:', self.moc.id)
          print('Order:', self.moc.order)
          print('Cells:', self.moc.cells)
          print('Area:', self.moc.area_sq_deg, 'square degrees')