code: def _is_queue(run):
      return run.opref.to_opspec() == "queue"
  
file_path: guildai/guild/plugins/queue_main.py
imports: import argparse
  import logging
  from guild import _api
  from guild import util
  from .None import gen_queue
label_desc: Use image node_id 5 for calling a global function with example usage: _is_queue(run) and returns: unknown