code: def get_id_with_prefix(identity):
      return bytes(f"sub_scheduler_{identity}", "utf8")
  
file_path: ipyparallel/ipyparallel/controller/broadcast_scheduler.py
imports: import logging
  import zmq
  from traitlets import Bool, Bytes, Integer, List, Unicode
  from ipyparallel import util
  from ipyparallel.controller.scheduler import Scheduler, ZMQStream, get_common_scheduler_streams
label_desc: Use image node_id 1 for calling a global function with example usage: get_id_with_prefix(identity) and returns: bytes