How do I apply delta transforms to normal transform?

How do I apply the delta transforms of a couple hundred objects (in a collection, if it helps) to normal transform? I can't even find an option to clear delta transforms.

There's the Object -> Apply -> Location to Deltas, option, but no equivalent to go in reverse!?

• I struggled to find a solution as well, what worked for me was joining with some other object that has 0 deltas and separating it back. But I am still trying to figure out something more usable, especially for multiple objects. – Jan Kadeřábek Jul 19 at 22:44

import bpy