code: def resolve_model_op(opspec, *_):
      if opspec in ("queue"):
          model = QueueModelProxy()
          return model, "queue"
      return None
  
file_path: guildai/guild/plugins/queue.py
imports: import yaml
  import guild
  from guild import guildfile
  from guild import model
  from guild import plugin
label_desc: Use image node_id 1 for calling the QueuePlugin obj's underlying member method code with example usage: obj.resolve_model_op(opspec) and returns: None, model,  str