code: def _filter_stream(stream_name, steam_item):
      if isinstance(steam_item, StreamItem):
          return (
              steam_item,
              steam_item.stream_name is None
              or steam_item.stream_name == stream_name,
          )
      else:
          return (steam_item, True)
  
imports: from typing import Dict, Any, Sequence
  from .lv_types import EventData, StreamItem, StreamCreateRequest, VisArgs
  from .evaler import Evaler
  from .stream import Stream
  from .stream_factory import StreamFactory
  from .filtered_stream import FilteredStream
  import uuid, time, functools
  from .None import utils
  from .notebook_maker import NotebookMaker
label_desc: Use image node_id 8 for calling the WatcherBase obj's underlying member method code with example usage: obj._filter_stream(stream_name, steam_item) and returns: steam_item,  unknown, steam_item,  True