Is there anyway to get WsOpcode in OnWsReceived?

[lifeengines]

currentlly WS_BINARY and WS_TEXT is callback on OnWsReceived ,bug don't pass this type,sometimes,we need known exact opcode type from client.
currentlly code:
case WS_BINARY: case WS_TEXT: { // Call the WebSocket received handler _wsHandler.OnWsReceived(WsReceiveFinalBuffer.Data, 0, WsReceiveFinalBuffer.Size); break; }