OptimizelyUserContext

public class OptimizelyUserContext {
  public var userId: String
  public var attributes: [String: Any?]
  
  public init(optimizely: OptimizelyClient,
              userId: String, 
              attributes: [String: Any]? = nil)
  
  // set an attribute for the user
  public func setAttribute(key: String, value: Any) -> Bool    
  
  // make a decision about which flag variation the user buckets into for the flag key 
  public func decide(key: String, 
                     options: [OptimizelyDecideOption]? = nil) -> OptimizelyDecision
  
  // make decisions about which flag variations the user buckets into for flag keys
  public func decide(keys: [String],                
                    options: [OptimizelyDecideOption]? = nil) -> [String: OptimizelyDecision]
  
  // make decisions about which flag variations the user buckets into for all flags
  public func decideAll(options: [OptimizelyDecideOption]? = nil) -> [String: OptimizelyDecision]
  
  // track user event
  public func trackEvent(eventKey: String, eventTags:  [String: Any]? = nil)
  
  // OptimizelyDecisionContext
  public struct OptimizelyDecisionContext {
    public let flagKey: String
    public let ruleKey: String?
  }
  
  // OptimizelyForcedDecision
  public struct OptimizelyForcedDecision {
    public let variationKey:String
  }
  
  // sets a forced decision (variationKey) for a given decision context (flagKey and optional ruleKey)
  public func setForcedDecision(context: OptimizelyDecisionContext, 
                                decision: OptimizelyForcedDecision) -> Bool
  
  // returns the forced decision (variationKey) for a given decision context (flagKey and optional ruleKey)
  public func getForcedDecision(context: OptimizelyDecisionContext) -> OptimizelyForcedDecision?

  // removes the forced decision (variationKey) for a given decision context (flagKey and optional ruleKey)
  public func removeForcedDecision(context: OptimizelyDecisionContext) -> Bool

  // removes all the forced decisions (variationKeys) for the user context
  public func removeAllForcedDecisions() -> Bool
}