code: def testCallableMatricesF64(self, matrix_name):
      self.checkApproxEigs(matrix_name, jnp.float64)
  
imports: import functools
  import re
  import os
  import unittest
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  import scipy.linalg
  import scipy.sparse
  import jax
  from jax import config
  from jax._src import test_util
  from jax.experimental.sparse import linalg, bcoo
  import jax.numpy
label_desc: Use image node_id 4 for calling the F64LobpcgTest obj's underlying member method code with example usage: obj.testCallableMatricesF64(matrix_name) without return types