import { Flag } from '../Flag';
import { FlagCreationOptions } from '../FlagCreationOptions';
/**
 * An implementation of Flag.
 */
export declare class FlagImpl implements Flag {
    id: string;
    open: boolean;
    options: FlagCreationOptions;
    onCloseCallback: Function;
    constructor(options: FlagCreationOptions, onCloseCallback: Function);
    close(): void;
    isOpen(): boolean;
}