code: def _update_learning_rate(self):
      ## TODO: add more default values for different models
      if not self.learning_rate:
          if "bert" in self.checkpoint:
              self.learning_rate = 5e-5
          else:
              self.learning_rate = 0.01
  
file_path: SynapseML/deep-learning/src/main/python/synapse/ml/dl/LitDeepTextModel.py
imports: import inspect
  import pytorch_lightning
  import torch
  import torch.nn.functional
  import torch.optim
  from pytorch_lightning.utilities import _module_available
label_desc: Use image node_id 6 for calling the LitDeepTextModel obj's underlying member method code with example usage: obj._update_learning_rate() without return types