export declare class FlagsService {
    flags: {};
    log: boolean;
    constructor(flags?: string[], log?: boolean);
    register(flags: string[]): void;
    enable(flag: string): void;
    disable(flag: string): void;
    flip(flag: string): void;
    enableLogging(): void;
    disableLogging(): void;
    enabled(flag: string): boolean;
}
