public function timeTracking($issueIdOrKey, $timeTracking)
{
$array = ['update' => ['timetracking' => [['edit' => $timeTracking]]]];
$data = json_encode($array);
$this->log->addDebug("TimeTracking req={$data}\n");
// if success, just return HTTP 201.
$ret = $this->exec($this->uri . "/{$issueIdOrKey}", $data, 'PUT');
return $ret;
}