protected function getRenamedColumns($columns)
    {
        $newColumns = array();
        foreach ($columns as $columnName => $columnValue) {
            $renamedColumn = $this->getRenamedColumn($columnName);
            if ($renamedColumn) {
                if ($renamedColumn == 'goals') {
                    $columnValue = $this->flattenGoalColumns($columnValue);
                }
                // If we happen to rename a column to a name that already exists,
                // sum both values in the column. This should really not happen, but
                // we introduced in 1.1 a new dataTable indexing scheme for Actions table, and
                // could end up with both strings and their int indexes counterpart in a monthly/yearly dataTable
                // built from DataTable with both formats
                if (isset($newColumns[$renamedColumn])) {
                    $columnValue += $newColumns[$renamedColumn];
                }

                $columnName = $renamedColumn;
            }
            $newColumns[$columnName] = $columnValue;
        }
        return $newColumns;
    }