public function getColumns(array $columnKeys)
    {
        $columns = [];

        foreach ($columnKeys as $columnKey) {
            $columns[] = $this->getColumn($columnKey);
        }

        return $columns;
    }
public function getColumns(array $columnKeys)
    {
        $columns = [];

        foreach ($columnKeys as $columnKey) {
            $columns[] = $this->getColumn($columnKey);
        }

        return $columns;
    }
public function getColumns ( array $ columnKeys ) { $ columns = [ ] ; foreach ( $ columnKeys as $ columnKey ) { $ columns [ ] = $ this -> getColumn ( $ columnKey ) ; } return $ columns ; }
Get the actual columns of the given column keys.

@param  array  $columnKeys
@return array
Get the actual columns of the given column keys .