code: def connection_info_and_slot(target_node_info):
      
      slot = None
      if isinstance(target_node_info, dict):
          target_node_info = target_node_info.copy()
          slot = target_node_info.pop("slot", None)
          if list(target_node_info) == ["connection_string"]:
              # if the dict only contains the `connection_string` key use it as-is
              target_node_info = target_node_info["connection_string"]
      connection_info = pgutil.get_connection_info(target_node_info)
      return connection_info, slot
docs: Process the input `target_node_info` entry which may be a libpq
      connection string or uri, or a dict containing key:value pairs of
      connection info entries or just the connection string with a replication
      slot name.  Return the connection info dict and a possible slot.