import { PickerColumn } from 'ionic-angular';
import { MultiPickerType, IMultiPickerTypeDateColumns, IMomentObject } from '../multi-picker-types';
export declare class MultiPickerTypeDate extends MultiPickerType {
    protected _columns: IMultiPickerTypeDateColumns;
    constructor(cmpAttrs: any);
    validate(columns: PickerColumn[], pickerValue?: string): void;
    protected defaultMoment(pickerValue: string): IMomentObject;
}