code: async def on_isupport_chanlimit(self, value):
          
          self._channel_limits = {}
  
          for entry in value.split(','):
              types, limit = entry.split(':')
  
              # Assign limit to channel type group and add lookup entry for type.
              self._channel_limits[frozenset(types)] = int(limit)
              for prefix in types:
                  self._channel_limit_groups[prefix] = frozenset(types)
docs: Simultaneous channel limits for user.