code: def __do_timings():
      import os
  
      res = os.getenv("SYMPY_TIMINGS", "")
      res = [x.strip() for x in res.split(",")]
      return set(res)
  
imports: import timeit
  import math
label_desc: Use image node_id 2 for calling a global function with example usage: __do_timings() and returns: set