code: def result_base(base, suffix, outdir):
      callback = _get_callback("result_base")
      if callback:
          return callback.result_base(base, suffix, outdir)
      else:
          return None
  
file_path: nnabla/python/src/nnabla/utils/callback.py
imports: from nnabla.config import nnabla_config
  import importlib
label_desc: Use image node_id 13 for calling a global function with example usage: result_base(base, suffix, outdir) and returns: callback, None