import { Table } from "../../lib/table";
import { BaseFunction } from "./__base";
export declare class VlookupFunction extends BaseFunction {
    example: string;
    helpText: string[];
    helpArgs: ({
        name: string;
        description: string;
        option?: undefined;
    } | {
        name: string;
        description: string;
        option: boolean;
    })[];
    protected validate(): void;
    protected main(key: any, range: Table, index: number, isSorted: boolean): any;
}
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