code: def override_gin(self, bindings):
      gin.parse_config_files_and_bindings(None, bindings)
  
imports: import collections
  from absl.testing import parameterized
  import gin
  import jax.numpy
  import numpy
  from tensorflow import test
  from trax import fastmath
label_desc: Use image node_id 2 for calling the BackendTest obj's underlying member method code with example usage: obj.override_gin(bindings) without return types