code: def test_nothing(self):
      # Ensure that there's at least one "real" test in the class, or else
      # our {setUp,tearDown}Class won't be called if, for example,
      # `parameter_space` returns None.
      pass
  
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 5 for calling the TestParameterSpace obj's underlying member method code with example usage: obj.test_nothing() without return types