code: def _passing_to_flaky(self) -> bool:
      # A test is flaky if it has been changing from passing to failing for
      # a certain percentage of time in the test history. However, if it has been
      # recently stable, then it is not flaky.
      if self._is_recently_stable():
          return False
      transition = 0
      for i in range(0, len(self.test_results) - 1):
          if (
              self.test_results[i].is_failing()
              and self.test_results[i + 1].is_passing()
          ):
              transition += 1
  
      if (
          transition
          >= FLAKY_PERCENTAGE_THRESHOLD * len(self.test_results) / 100
      ):
          return True
      return False
  
file_path: ray/release/ray_release/test_automation/ci_state_machine.py
imports: from ray_release.test_automation.state_machine import TestStateMachine, DEFAULT_ISSUE_OWNER
  from ray_release.test import Test, TestState
label_desc: Use image node_id 7 for calling the CITestStateMachine obj's underlying member method code with example usage: obj._passing_to_flaky() and returns: False, False, True