code: def test_state_with_matrix_shape(self, solver, solution_times_fn):
      ode_fn = lambda time, state: -state
      initial_time = 0.0
      initial_state = np.float64([[1.0, 2.0], [3.0, 4.0]])
      jacobian = np.reshape(
          np.diag(-np.ones([4])),
          np.concatenate([initial_state.shape, initial_state.shape]),
      )
      solver_instance = solver(rtol=_RTOL, atol=_ATOL)
      results = solver_instance.solve(
          ode_fn,
          initial_time,
          initial_state,
          solution_times=solution_times_fn(1.0),
          jacobian_fn=jacobian,
      )
      times, states = self.evaluate([results.times, results.states])
      states_exact = (
          np.exp(-times)[:, np.newaxis, np.newaxis] * initial_state
      )
      self.assertAllClose(states, states_exact)
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math import gradient
  from tensorflow_probability.python.math.ode import base
  from tensorflow_probability.python.math.ode import bdf
  from tensorflow_probability.python.math.ode import dormand_prince
label_desc: Use image node_id 2 for calling the NonStiffTest obj's underlying member method code with example usage: obj.test_state_with_matrix_shape(solver, solution_times_fn) without return types