a2dp delay reporting

[Ethan White <ethan@xxxxxxxxxxxxxx>]

Hi,

How do I inform Bluez of my a2dp transport delay?  The media-api 
document shows a Delay property for the MediaTransport1 interface but 
attempts at writing this property yield the following error:

org.freedesktop.DBus.Error.PropertyReadOnly: Property 'Delay' is not 
writable


Reviewing profiles/audio/transport.c a2dp_properties (Bluez 5.70) I find 
that the delay property does not have a set function:

line 846: { "Delay", "q", get_delay_reporting, NULL, 
delay_reporting_exists },


What am I missing here?  How an I supposed to inform the a2dp source of 
my playback delay?  Thanks for any help.

Regards,
Ethan