docs: def register(cls, name: str, plugin: Type[ConnectionPlugin]) -> None:
          """Registers a connection plugin with a specified name
  
          Args:
              name: name of the connection plugin to register
              plugin: defined connection plugin class
  
          Raises:
              :obj:`nornir.core.exceptions.ConnectionPluginAlreadyRegistered` if
                  another plugin with the specified name was already registered
          """
          existing_plugin = cls.available.get(name)
          if existing_plugin is None:
              cls.available[name] = plugin
          elif existing_plugin != plugin:
              raise ConnectionPluginAlreadyRegistered(
                  f"Connection plugin {plugin.__name__} can't be registered as "
                  f"{name!r} because plugin {existing_plugin.__name__} "
                  f"was already registered under this name"
              )