code: def test_call(self):
      assert not self.trigger(self.trainer)
      self.trainer.elapsed_time = 0.9
      assert not self.trigger(self.trainer)
  
      # first event is triggerred on time==1.0
      self.trainer.elapsed_time = 1.2
      assert self.trigger(self.trainer)
  
      self.trainer.elapsed_time = 1.3
      assert not self.trigger(self.trainer)
  
      # second event is triggerred on time==2.0, and is not on time==2.2
      self.trainer.elapsed_time = 2.1
      assert self.trigger(self.trainer)
  
file_path: chainer/tests/chainer_tests/training_tests/triggers_tests/test_time_trigger.py
imports: import io
  import unittest
  import chainer
  from chainer import testing
label_desc: Use image node_id 2 for calling the TestTimeTrigger obj's underlying member method code with example usage: obj.test_call() without return types