code: def get_optimizer_parameters(self, config):
      # TODO: Update after implementing decoder
      params = [
          {"params": self.img_embeddings_list.parameters()},
          {"params": self.text_embeddings.parameters()},
          {"params": self.multi_modal_combine_layer.parameters()},
          {"params": self.decoder.projection_layer.parameters()},
          {
              "params": self.img_feat_encoders.parameters(),
              "lr": (config.optimizer.params.lr * 0.1),
          },
      ]
  
      return params
  
file_path: mmf/mmf/models/visdial_multi_modal.py
imports: from mmf.models.pythia import Pythia
  from mmf.modules.decoders import VisDialDiscriminator
label_desc: Use image node_id 4 for calling the VisDialMultiModalModel obj's underlying member method code with example usage: obj.get_optimizer_parameters(config) and returns: params