/// <reference types="node" />
import { PathLike } from "fs";
import { ConfigurationProvider } from "./config-provider.abstract";
export declare class FileConfigurationProvider extends ConfigurationProvider {
    readonly filename: PathLike;
    readonly optional: boolean;
    protected readonly fileLoader: (path: PathLike) => any;
    constructor(filename: PathLike, optional: boolean, fileLoader: (path: PathLike) => any);
    loadConfigObject(): any;
    toString(): string;
}