public function lastIndexOfExamples()
{
return ['match last occurence' => ['canal', 'a', null, 3], 'match with from index' => ['canal', 'a', 2, 1], 'no match with from index too low' => ['canal', 'a', 0, -1], 'no match' => ['canal', 'x', null, -1], 'unicode content is matched' => ['Öaßaü', 'a', null, 3]];
}