docs: def disconnect(self, key=None, func=None):
          """Disconnect the connections to the an rcParams key
  
          Parameters
          ----------
          key: str
              The rcParams key. If None, all keys are used
          func: function
              The function that is connected. If None, all functions are
              connected
          """
          if key is None:
              for key, connections in self._connections.items():
                  for conn in connections[:]:
                      if func is None or conn is func:
                          connections.remove(conn)
          else:
              connections = self._connections[key]
              for conn in connections[:]:
                  if func is None or conn is func:
                      connections.remove(conn)