Event signal for ProgressiveSourceLoading enabled

The relatively new feature "ProgressiveSourceLoading " provides a massive speed in loading time, although sometimes we need to start some command after the load is completed.

We need to get the frame range of the loaded sources for instance which with 'ProgressiveSourceLoading ’ enabled is set to 20 frames.

rv.commands.bind() with ‘after-progressive-loading’ argument was working fine previously (using single threaded rv.commands.addSourceVerbose()) but it seems to not be enough now, is that right? do we have some new signal type to implement?

For now I’m using “rv.commands.addSourceBegin()”, combined with ‘after-progressive-loading’ signal, which speeds up the load a bit, but “ProgressiveSourceLoading”, is still much faster.