code: def start(self):
      for proc in self.procs:
          proc.start()
  
file_path: gluonts/src/gluonts/nursery/glide/parallel.py
imports: import multiprocessing
  from functools import partial
  from toolz.itertoolz import partition_all
  from toolz.functoolz import identity
label_desc: Use image node_id 3 for calling the ParApplyIterator obj's underlying member method code with example usage: obj.start() without return types