Upgrade to 3.5 fails with errors

Suite and Optimus Suite 5
#1

After replacing the old version of dhtmlx with version 3.5 grids and trees no longer work as they did.

Grid connector gives me this error:
Declaration of GridConnector::fill_collections() should be compatible with that of Connector::fill_collections()

The very same code was working with the old version of Dhtmlx

If I go back to the old version then everything works like a charm.

#2

Unfortunately the issue cannot be reconstructed locally.
Please, provide us with any kind of sample of your code or a complete demo where the issue can be reproduced.