code: def _get_generator_func(self, *args, **kwargs):
      assert isinstance(
          self.target_method, str
      ), "generate_method must be overridden"
      f = getattr(self.rng, self.target_method)
      return lambda: f(*args, **kwargs)
  
imports: import functools
  import unittest
  import numpy
  import cupy
  from cupy import testing
  from cupy.testing import _condition
label_desc: Use image node_id 4 for calling the BaseGeneratorTestCase obj's underlying member method code with example usage: obj._get_generator_func() and returns: function