/// <summary>
 /// This function will invoke the quality callback on the user supplied callback implementation.
 /// </summary>
 internal void InvokeQuality(int nativeQuality, string symbol)
 {
     if (null != mCallback)
     {
         // Invoke the callback
         mCallback.onQuality(Subscription, (mamaQuality)nativeQuality, symbol);
     }
 }