export interface IConfigurationBackend {
    get(key: string): string;
    get(key: string, options: TGetParamBaseOptions<true | undefined, "boolean">): boolean;
    get(key: string, options: TGetParamBaseOptions<false, "boolean">): boolean | undefined;
    get(key: string, options: TGetParamBaseOptions<true | undefined, "number">): number;
    get(key: string, options: TGetParamBaseOptions<false, "number">): number | undefined;
    get(key: string, options: TGetParamBaseOptions<true | undefined, "array">): string[];
    get(key: string, options: TGetParamBaseOptions<false, "array">): string[] | undefined;
}
export declare type ClassType<T> = new (...args: any[]) => T;
declare type TGetParamBaseOptions<R = boolean | undefined, C = undefined> = {
    /**
     * @default true
     */
    required?: R;
    defaultValue?: any;
    /**
     * @default false
     */
    isSecure?: boolean;
    cls?: C;
};
export declare type TGetParamOptions = TGetParamBaseOptions<boolean | undefined, "boolean" | "number" | "array">;
export {};
//# sourceMappingURL=config-backend.interface.d.ts.map