components/Interpreter.php
private function _getSecondaryKeys($data, $key = null)
    {
        if ($key) {
            $data = ArrayHelper::getValue($data, $key, []);
        }

        return ArrayHelper::getColumn($data, $this->relSecondaryKey);
    }
private function _getSecondaryKeys($data, $key = null)
    {
        if ($key) {
            $data = ArrayHelper::getValue($data, $key, []);
        }

        return ArrayHelper::getColumn($data, $this->relSecondaryKey);
    }
private function _getSecondaryKeys ( $ data , $ key = null ) { if ( $ key ) { $ data = ArrayHelper :: getValue ( $ data , $ key , [ ] ) ; } return ArrayHelper :: getColumn ( $ data , $ this -> relSecondaryKey ) ; }
Retrieves secondary keys
@param type $data
Retrieves secondary keys