IPixelStreaming2Streamer::OnStreamingStopped

A getter for the OnStreamingStopped event. Intent is for users to call [IPixelStreaming2Module::Get()](API\Plugins\PixelStreaming2\IPixelStreaming2Module\Get).FindStreamer(ID)->[OnStreamingStopped()](API\Plugins\PixelStreaming2\IPixelStreaming2Streamer\OnStreamingStopped).AddXXX.