code: def test_default_scheduler_building(
      self, model_sample, train_dataset, training_configs_learning_rate
  ):
      trainer = CoupledOptimizerTrainer(
          model=model_sample,
          train_dataset=train_dataset,
          training_config=training_configs_learning_rate,
      )
  
      trainer.set_encoder_optimizer()
      trainer.set_encoder_scheduler()
      trainer.set_decoder_optimizer()
      trainer.set_decoder_scheduler()
  
      assert trainer.encoder_scheduler is None
      assert trainer.decoder_scheduler is None
  
imports: import os
  from copy import deepcopy
  import pytest
  import torch
  from pythae.models import RAE_L2, RAE_L2_Config
  from pythae.trainers import CoupledOptimizerTrainer, CoupledOptimizerTrainerConfig
  from tests.data.custom_architectures import *
label_desc: Use image node_id 5 for calling the Test_Build_Scheduler obj's underlying member method code with example usage: obj.test_default_scheduler_building(model_sample, train_dataset, training_configs_learning_rate) without return types