/// <reference types="leaf-ts" />
export declare type Callback<TData = any> = (err?: Error, data?: TData) => void;
export declare class DataProvider<TVM, TData, TRequestOption> {
    widget: Leaf.Widget<any, TVM>;
    fetcher: (option: TRequestOption, callback: Callback<TData>) => void;
    constructor(option: {
        widget: Leaf.Widget<any, TVM>;
        fetcher: (option: TRequestOption, callback: Callback<TData>) => void;
    });
    events: Leaf.EventEmitter<{
        update: any;
        error: Error;
    }>;
    refresh(option?: TRequestOption): this;
    map(dataMap: {
        [K in keyof TVM]: keyof TData | ((TData) => any);
    }): this;
    fill(data: TData): void;
    private dataMap;
}
export declare type Constructor<T> = {
    new (...args: any[]): T;
};
export declare class ListDataProvider<TData, TItem extends Leaf.ListItem, TRequestOption, TVM = TItem["VM"]> {
    list: Leaf.List<TItem>;
    fetcher: (option: TRequestOption, callback: Callback<TData[]>) => void;
    Item: Constructor<TItem>;
    constructor(option: {
        list: Leaf.List<TItem>;
        fetcher: (option: TRequestOption, callback: Callback<TData[]>) => void;
        Item: Constructor<TItem>;
    });
    events: Leaf.EventEmitter<{
        update: any;
        error: Error;
    }>;
    refresh(option?: TRequestOption): void;
    transform(transformer: (data: TData) => any): void;
    private transformer;
    map(dataMap: {
        [K in keyof TVM]: keyof TData | ((TData) => any);
    }): void;
    fill(datas: TData[]): void;
    private dataMap;
}