class_docstr: Class for registry object which acts as central source of truth
  for MMF
code: def register_scheduler(cls, name):
      def wrap(func):
          cls.mapping["scheduler_name_mapping"][name] = func
          return func
  
      return wrap
  
imports: from mmf.utils.env import setup_imports
label_desc: Use image node_id 12 for calling the Registry obj's underlying member method code with example usage: obj.register_scheduler(cls, name) and returns: wrap, func