code: def test_for_loop_can_read_from_ref(self, for_impl):
      def body(_, x_ref):
          x_ref[()]  # pylint: disable=pointless-statement
  
      x = for_impl(1, body, jnp.float32(0.0))
      self.assertEqual(x, 0.0)
  
imports: from functools import partial
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  import jax
  from jax import random
  from jax._src import test_util
  from jax._src.lax.control_flow import for_loop
  import jax.numpy
  from jax import config
label_desc: Use image node_id 4 for calling the ForLoopTest obj's underlying member method code with example usage: obj.test_for_loop_can_read_from_ref(for_impl) without return types