3.1.7.1 GET_BUFFER_REMAINING
The reliable messaging destination (RMD) MUST trigger the GET_BUFFER_REMAINING event when adding a SequenceAcknowledgement header block to a message.
If the GET_BUFFER_REMAINING event is signaled, the following actions MUST be performed:
The GET_BUFFER_REMAINING event MUST return the value of the advanced flow-control object's (AFCO) Buffer Remaining field.
The RMD MUST use the return value to set the value of the BufferRemaining element in the SequenceAcknowledgement header block.