src/Jsonq.php
protected function makeImplode($key, $delimiter)
    {
        $data = array_column($this->_map, $key);

        if (is_array($data)) {
            return implode($delimiter, $data);
        }

        return null;
    }
protected function makeImplode($key, $delimiter)
    {
        $data = array_column($this->_map, $key);

        if (is_array($data)) {
            return implode($delimiter, $data);
        }

        return null;
    }
protected function makeImplode ( $ key , $ delimiter ) { $ data = array_column ( $ this -> _map , $ key ) ; if ( is_array ( $ data ) ) { return implode ( $ delimiter , $ data ) ; } return null ; }
process implode from resulting data

@param string $key
@param string $delimiter
@return string|null
process implode from resulting data