code: def test_for_loop_can_read_from_and_write_to_refs(self, for_impl):
      def body2(_, refs):
          x_ref, y_ref = refs
          x = x_ref[()]
          y_ref[()] = x + 1.0
          x_ref[()] = x + 1.0
  
      x, y = for_impl(5, body2, (0.0, 0.0))
      self.assertEqual(x, 5.0)
      self.assertEqual(y, 5.0)
  
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 6 for calling the ForLoopTest obj's underlying member method code with example usage: obj.test_for_loop_can_read_from_and_write_to_refs(for_impl) without return types