Fire event on metadata FETCHING (not just fetched
There is a helpful event for metadataFetched. However, it would be even more helpful to also add an event right BEFORE the metadata request is sent out.
My use case for this is I am showing textual progress updates on screen, and I would like to update the message when metadata is fetching. I can use the "Fetched" event to show that we are done, but would need a "Fetching" event to indicate when we start.
Reason for this is because Metadata may get fetched at times even when I did not explicitly call for it (when making service all for first time when no metadata is stored yet), so it is not easy to know when Metadata is being fetched. (Now I am using Angular http interceptor to check url for metadata calls, then broadcasting event, but this is very hacky)