import { Flag } from '../Flag';
import { FlagImpl } from './FlagImpl';
import { FlagProvider } from '../FlagProvider';
import { FlagCreationOptions } from '../FlagCreationOptions';
/**
 * An implementation of FlagProvider.
 */
export declare class FlagProviderImpl implements FlagProvider {
    static AUTO_CLOSE_PERIOD_MILLIS: number;
    flagIdsToFlags: Map<string, FlagImpl>;
    create(options: FlagCreationOptions): Flag;
    closeFlagById(flagId: string): void;
    isFlagOpen(flagId: string): boolean;
}