Wallet synchronization status

[inaltoasinistra]

We are developing a Dart mobile wallet using Gdk as wallet engine. We are interested about the singlesig features.
We understood Gdk uses a local cache and there is a thread that synchronize it.
We did not find any way to control the synchronization, or even to know its status. Is there some tool to manage it?
We think knowing the status would be useful, for example to import a wallet.
What do you think about this feature?