code: def _num_optimizing_steps(self) -> int:
      return len(self.configure_optimizers())
  
imports: import inspect
  import logging
  import pytorch_lightning
  import torch
  from reagent.core.tensorboardX import SummaryWriterContext
  from reagent.core.utils import lazy_property
  from typing_extensions import final
label_desc: Use image node_id 12 for calling the ReAgentLightningModule obj's underlying member method code with example usage: obj._num_optimizing_steps() and returns: len