code: def test_MLB(self):
      fusion = fusions.MLB(self.input_dims, self.output_dims, mm_dim=20)
      out = fusion(self.x)
      if torch.cuda.is_available():
          fusion.cuda()
          out = fusion([self.x[0].cuda(), self.x[1].cuda()])
      assert torch.Size([2, 2]) == out.shape
  
file_path: mmf/tests/modules/test_fusions.py
imports: import unittest
  import mmf.modules.fusions
  import torch
label_desc: Use image node_id 6 for calling the TestModuleFusions obj's underlying member method code with example usage: obj.test_MLB() without return types