/// <reference types="node" />
import { IDataTableSerializer } from './IDataTableSerializer';
import { DataTable } from './DataTable';
export declare class DataTableXlsSerializer implements IDataTableSerializer {
    readonly extension: string;
    constructor();
    serialize(dataTable: DataTable): Buffer;
    private getCellType(value);
    /** Gets the index of the column. If it doesn't exist, it adds it to the columns array  */
    private getColIndex(colName, columns);
    deserialize(data: Buffer): DataTable;
}