import { UpGradeClientInterfaces } from '../types';
import { IExperimentAssignmentv5 } from 'upgrade_types';
/**
 * Synchronous data store
 */
export declare class DataService {
    private group;
    private workingGroup;
    private experimentAssignmentData;
    private featureFlags;
    getGroup(): UpGradeClientInterfaces.IExperimentUserGroup;
    setGroup(group: UpGradeClientInterfaces.IExperimentUserGroup): void;
    getWorkingGroup(): UpGradeClientInterfaces.IExperimentUserWorkingGroup;
    setWorkingGroup(workingGroup: UpGradeClientInterfaces.IExperimentUserWorkingGroup): void;
    getExperimentAssignmentData(): IExperimentAssignmentv5[];
    setExperimentAssignmentData(experimentAssignmentData: IExperimentAssignmentv5[]): void;
    getFeatureFlags(): string[];
    setFeatureFlags(featureFlags: string[]): void;
    rotateAssignmentList(assignment: IExperimentAssignmentv5): IExperimentAssignmentv5;
    findExperimentAssignmentBySiteAndTarget(site: string, target: string): IExperimentAssignmentv5;
    hasFeatureFlag(key: string): boolean;
}