code: def test_cg_weak_types(self):
      x, _ = jax.scipy.sparse.linalg.bicgstab(lambda x: x, 1.0)
      self.assertTrue(dtypes.is_weakly_typed(x))
  
imports: from functools import partial
  import unittest
  from absl.testing import absltest
  import numpy
  import scipy.sparse.linalg
  import jax
  import jax.numpy
  import jax.scipy.sparse.linalg
  from jax import jit
  from jax import lax
  from jax.tree_util import register_pytree_node_class
  import jax._src.scipy.sparse.linalg
  from jax._src import config
  from jax._src import dtypes
  from jax._src import test_util
label_desc: Use image node_id 9 for calling the LaxBackedScipyTests obj's underlying member method code with example usage: obj.test_cg_weak_types() without return types