Attempts to reuse template instances when items are being removed and created.

The default is None

Be aware that when using this feature several other features may no longer work as expected, such as: - RemovingAnimation: the reused items are not actually removed - AddingAnimation: the resused items are not actually added, just moved - Completed: As a reused item is not added/removed it will not trigger a second time

This feature will remain experimental until we can figure out which of these issues can be solved, avoided, or just need to be accepted.