code: def save_workload_func_registry(filename):
      """Dump workload function registry to a pickle binary file.
  
      Parameters
      ----------
      filename : str
          The filename to dump workload function registry to.
      """
      global WORKLOAD_FUNC_REGISTRY
  
      pickle.dump(WORKLOAD_FUNC_REGISTRY, open(filename, "wb"))
  
file_path: tvm/python/tvm/auto_scheduler/workload_registry.py
imports: import json
  import logging
  import pickle
  import tvm._ffi
  from tvm.runtime._ffi_node_api import LoadJSON, SaveJSON
  from .utils import deserialize_args, get_func_name, serialize_args
label_desc: Use image node_id 7 for calling a global function with example usage: save_workload_func_registry(filename) without return types