code: def cond(a, b, c=None, d=None):
      return c is not None
  
file_path: nnabla/python/test/utils/test_function_profile.py
imports: import time
  import pytest
  import nnabla.utils.function_profile
label_desc: Use image node_id 3 for calling a global function with example usage: cond(a, b, c, d) and returns: unknown