code: def test_lasso(
      self, backend_config0, backend_config1, backend_config2
  ):
      self.check_lasso(
          [backend_config0, backend_config1, backend_config2]
      )
  
file_path: chainer/tests/chainer_tests/optimizer_hooks_tests/test_lasso.py
imports: import unittest
  import numpy
  from chainer import optimizer_hooks
  from chainer import optimizers
  from chainer import testing
  import utils
label_desc: Use image node_id 3 for calling the TestLasso obj's underlying member method code with example usage: obj.test_lasso(backend_config0, backend_config1, backend_config2) without return types