code: def run_manager_customized():
      MyManager.register("Maths", MathsClass)
      with MyManager() as manager:
          maths = manager.Maths()
          print(maths.add(4, 3))
          print(maths.mul(7, 8))
  
file_path: fiber/examples/shared_data.py
imports: import fiber
  from fiber.managers import BaseManager
label_desc: Use image node_id 3 for calling a global function with example usage: run_manager_customized() without return types