code: def get_connection(self, *args, **kwargs):
          
          key = env.get('host_string'), kwargs.get('base_url', env.get('docker_base_url'))
          default_config = _get_default_config(None)
          if default_config:
              if key not in self:
                  self[key] = default_config
              return default_config.get_client()
          config = self.get_or_create_connection(key, self.configuration_class, *args, **kwargs)
          return config.get_client()
docs: Create a new connection, or return an existing one from the cache. Uses Fabric's current ``env.host_string``
          and the URL to the Docker service.
  
          :param args: Additional arguments for the client constructor, if a new client has to be instantiated.
          :param kwargs: Additional keyword args for the client constructor, if a new client has to be instantiated.