static TopekaDatabaseHelper GetInstance(Context context)
 {
     if (instance == null)
         instance = new TopekaDatabaseHelper(context);
     return instance;
 }
 static TopekaDatabaseHelper GetInstance(Context context)
 {
     return(instance = instance ?? new TopekaDatabaseHelper(context));
 }
 static TopekaDatabaseHelper GetInstance(Context context)
 {
     return instance = instance ?? new TopekaDatabaseHelper (context);
 }