declare type PickerColumn = Array<string | PickerColumnItem>;
export interface PickerColumnItem {
    label: string;
    value: string;
    key?: string | number;
}
export declare type DatePrecision = 'year' | 'month' | 'day' | 'hour' | 'minute' | 'second';
export declare function generateDatePickerColumns(selected: string[], min: Date, max: Date, precision: DatePrecision, unit: boolean): PickerColumn[];
export declare function convertDateToStringArray(date: Date | undefined | null): string[];
export declare function convertStringArrayToDate(value: Array<string | null | undefined>): Date;
export {};