code: def setUp(self):
      self.test_pruning = False
      self.model_tester = RealmModelTester(self)
      self.config_tester = ConfigTester(self, config_class=RealmConfig)
  
imports: import copy
  import unittest
  import numpy
  from transformers import RealmConfig, is_torch_available
  from transformers.testing_utils import require_torch, slow, torch_device
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor, random_attention_mask
label_desc: Use image node_id 1 for calling the RealmModelTest obj's underlying member method code with example usage: obj.setUp() without return types