Unable to pass beforeBuild and beforeSend options in AV Insight functions

[romainst]

Hi,
Could you please add the possibility to pass a beforeBuild / beforeSend object within the AV Insights Media definition?
At the moment, if I want to execute a function that retrieves and sets my page's properties to make them available in the AV calls, I must call it manually before I call the AV function. Therefore if the call is made automatically by the SDK (heartbeats), I do not get my page properties in the data sent.
It would be great to be able to pass beforeSend and beforeBuild callback when defining the Media object so that ALL AV calls execute beforeBuild and beforeSend callbacks like it's done in sendEvent.

https://developers.atinternet-solutions.com/piano-analytics/data-collection/how-to-send-events/send-events-via-sdks#tagging-methods (beforeBuild and beforeSend options)
https://developers.atinternet-solutions.com/piano-analytics/data-collection/how-to-send-events/av-insights#media-instantiation