private static void ExtractVariables(ActivityStateRecord activityStateRecord, ActivityStateQuery activityStateQuery)
 {
     if (activityStateQuery.HasVariables)
     {
         activityStateRecord.Variables = activityStateRecord.GetVariables(activityStateQuery.Variables);
     }
     else
     {
         activityStateRecord.Variables = ActivityUtilities.EmptyParameters;
     }
 }