code: def scheduler_opt(self):
      return self._scheduler._scheduler_opt
  
imports: import sys
  from torch.optim import lr_scheduler
  from omegaconf import OmegaConf
  from omegaconf.dictconfig import DictConfig
  import logging
  from torch.optim.lr_scheduler import LambdaLR
  from torch_points3d.utils.enums import SchedulerUpdateOn
label_desc: Use image node_id 3 for calling the LRScheduler obj's underlying member method code with example usage: obj.scheduler_opt() and returns: self