code: def event_and_time(self):
      event = np.random.binomial(1, 0.5, size=100)
      time = np.exp(np.random.randn(100))
      return event, time
  
imports: from collections import OrderedDict
  from contextlib import nullcontext
  import numpy
  from numpy.testing import assert_array_equal
  import pandas
  import pandas.testing
  import pytest
  from sksurv.testing import FixtureParameterFactory
  from sksurv.util import Surv, _PropertyAvailableIfDescriptor, property_available_if, safe_concat
label_desc: Use image node_id 1 for calling the SurvCases obj's underlying member method code with example usage: obj.event_and_time() and returns: event,  time