class OptimizelyUserContext {  // set attributes for the user  Future<BaseResponse> setAttributes(Map<String, dynamic> attributes)  // make a decision about which flag variation the user buckets into for the flag key  Future<DecideResponse> decide(String key, [Set<OptimizelyDecideOption> options = const {}])  // make decisions about which flag variations the user buckets into for flag keys   Future<DecideForKeysResponse> decideForKeys(List<String> keys, [Set<OptimizelyDecideOption> options = const {}])  // make decisions about which flag variations the user buckets into for all flags  Future<DecideForKeysResponse> decideAll([Set<OptimizelyDecideOption> options = const {}])  // track user event  Future<BaseResponse> trackEvent(String eventKey, [Map<String, dynamic> eventTags = const {}])  // sets a forced decision (variationKey) for a given decision context  Future<BaseResponse> setForcedDecision(OptimizelyDecisionContext context, OptimizelyForcedDecision decision)  // returns the forced decision (variationKey) for a given decision context  Future<GetForcedDecisionResponse> getForcedDecision(OptimizelyDecisionContext context)  // removes the forced decision (variationKey) for a given decision context  Future<BaseResponse> removeForcedDecision(OptimizelyDecisionContext context)  // removes all the forced decisions (variationKeys) for the user context  Future<BaseResponse> removeAllForcedDecisions()  //  // The following methods require Real-Time Audiences for Feature Experimentation to be configured.  //  // An array of audience segment names that the user is qualified for.   // The result of **fetchQualifiedSegments()** is saved here.   // Can be nil if not properly updated with fetchQualifiedSegments().   //   //  You can read and write directly to the qualified segments array.     //  This lets you bypass the remote fetching process from ODP   //  or for utilizing your own fetching service.     Future<GetQualifiedSegmentsResponse> getQualifiedSegments()  /// Sets qualified segments for the user context.  ///  /// Takes [qualifiedSegments] A [List] of strings specifying qualified segments for the user.  /// Returns [BaseResponse]  Future<BaseResponse> setQualifiedSegments(List<String> qualifiedSegments)  /// Fetch all qualified segments for the user context.  ///  /// The segments fetched will be saved in **qualifiedSegments** and can be accessed any time using **getQualifiedSegments**.  /// On failure, **qualifiedSegments** will be nil and an error will be returned.  /// Optional [options] A set of [OptimizelySegmentOption] for fetching qualified segments.  /// Returns [BaseResponse]  Future<BaseResponse> fetchQualifiedSegments([Set<OptimizelySegmentOption> options = const {}])  /// Checks if the user is qualified for the given segment.  ///  /// Takes [segment] The segment name to check qualification for.  /// Returns [BaseResponse]  Future<BaseResponse> isQualifiedFor(String segment)}