QModbusRtuSerialMaster queue

[mmiacca]

I'm using QModbusRtuSerialMaster to communicate with many modbus slaves, the QModbusRtuSerialMaster has a queue to acomodate sendReadRequest and sendWriteRequest calls, ok, but i can't know how many waiting message are there in the queue.
Then if i need to include a sendWriteRequest at any time, the write to de slave takes a long time, because the queue.
Is there any simple way know the size of queue to limit this size.
If not, it's possible to ask for a new function?.
Tks in advance.

[mmiacca]

I solved this with a QList of the objects returned by sendWriteRequest