code: def test_instance_of(self):
      self.assertEqual(1, instance_of(int))
      self.assertNotEqual(1, instance_of(str))
      self.assertEqual(1, instance_of((str, int)))
      self.assertEqual("foo", instance_of((str, int)))
  
imports: from itertools import product
  from unittest import TestCase
  from numpy import array, empty
  from zipline._protocol import BarData
  from zipline.finance.asset_restrictions import NoRestrictions
  from zipline.finance.order import Order
  from zipline.testing import check_arrays, make_alternating_boolean_array, make_cascading_boolean_array, parameter_space
  from zipline.testing.fixtures import WithConstantEquityMinuteBarData, WithDataPortal, ZiplineTestCase
  from zipline.testing.slippage import TestingSlippage
  from zipline.testing.predicates import wildcard, instance_of
  from zipline.utils.numpy_utils import bool_dtype
label_desc: Use image node_id 2 for calling the TestPredicates obj's underlying member method code with example usage: obj.test_instance_of() without return types