public function getTransition($issueIdOrKey)
{
$ret = $this->exec($this->uri . "/{$issueIdOrKey}/transitions");
$this->log->addDebug('getTransitions result=' . var_export($ret, true));
$data = json_encode(json_decode($ret)->transitions);
$transitions = $this->json_mapper->mapArray(json_decode($data), new \ArrayObject(), '\\JiraRestApi\\Issue\\Transition');
return $transitions;
}