code: def test_subtract_filter(self):
      def subtract_check(a, b, ans):
          self.assertEqual(scope.subtract_filters(a, b), ans)
  
      subtract_check(["a", "b"], ["b", "c"], set(["a"]))
      subtract_check(True, False, scope.DenyList(False))
      subtract_check(False, False, set())
      subtract_check(True, True, False)
      subtract_check(True, "a", scope.DenyList("a"))
      subtract_check(
          scope.DenyList(["a", "b"]),
          scope.DenyList(["b", "c"]),
          set(["c"]),
      )
      subtract_check(
          scope.DenyList(["a", "b"]),
          ["b", "c"],
          scope.DenyList(set(["a", "b", "c"])),
      )
  
imports: import jax
  import numpy
  from absl.testing import absltest
  from jax import numpy
  from jax import random
  from flax import errors
  from flax.configurations import temp_flip_flag
  from flax.core import Scope, apply, freeze, init, lazy_init, nn, scope
  from flax.core.scope import LazyRng
label_desc: Use image node_id 5 for calling the ScopeTest obj's underlying member method code with example usage: obj.test_subtract_filter() without return types