code: def assert_not_restricted(self, rl, asset, dt):
      self.assertFalse(rl.is_restricted(asset, dt))
  
imports: import pandas
  from pandas.util.testing import assert_series_equal
  from six import iteritems
  from functools import partial
  from toolz import groupby
  from zipline.finance.asset_restrictions import RESTRICTION_STATES, Restriction, HistoricalRestrictions, StaticRestrictions, SecurityListRestrictions, NoRestrictions, _UnionRestrictions
  from zipline.testing import parameter_space
  from zipline.testing.fixtures import WithDataPortal, ZiplineTestCase
label_desc: Use image node_id 3 for calling the RestrictionsTestCase obj's underlying member method code with example usage: obj.assert_not_restricted(rl, asset, dt) without return types