if discardOldest === true, older items are removed from the queue when queue overflows
Optionalitemthe monitoredItem Id assigned by the server to this monitoredItem.
the size of the queue.
the monitored item sampling interval ..
OptionaltimestampsCalculate the required size to store this object in a binary stream.
Encode the object to the binary stream.
verify that all object attributes values are valid according to schema
the client handle