src/Phossa/Query/Clause/HintTrait.php
protected function buildHint()/*# : array */
    {
        $res = [];
        foreach ($this->clause_hints as $name => $status) {
            if ($status) {
                $res[] = $name;
            }
        }
        if (!empty($res)) {
            return [join(' ', $res)];
        } else {
            return [];
        }
    }
protected function buildHint()/*# : array */
    {
        $res = [];
        foreach ($this->clause_hints as $name => $status) {
            if ($status) {
                $res[] = $name;
            }
        }
        if (!empty($res)) {
            return [join(' ', $res)];
        } else {
            return [];
        }
    }
Build HINT

@return array
@access protected