code: def get_backend_passes(backend):
      """Returns the list of optimizer passes belonging to a backend
  
      Args:
          backend (str): Name of the backend.
  
      Returns:
          list: List of optimizer names registered with the given backend.
      """
      return [
          opt
          for opt in optimizer_map.keys()
          if opt.startswith(backend.lower() + ":")
      ]
  
imports: import importlib
  import inspect
  import os
  from hls4ml.utils.string_utils import convert_to_snake_case
label_desc: Use image node_id 9 for calling a global function with example usage: get_backend_passes(backend) and returns: unknown