import stream from "stream";
interface FormatterOptions {
    objectMode?: boolean;
    dateFormat?: string;
    isoDatetime?: boolean;
}
export interface ColumnTypeStats {
    date: number;
    number: number;
    currency: number;
    string: number;
}
export default class Formatter extends stream.Transform {
    private dateFormat?;
    private isoDatetime?;
    columnTypes: ColumnTypeStats[];
    constructor(opts: FormatterOptions);
    _transform(row: string[], _1: string, chunkIsProcessedCb: () => void): void;
}
export {};