There were three methods with succinct but slightly unclear names: - Action::slot_move() - Channelbag::channel_group_move() - Channelbag::fcurve_move() The ambiguity is due to other functions with similar names that e.g. move fcurves *between* Channelbags, etc. Whereas these methods only move items to other positions within the array they're already in. To make this clearer, this PR adds `_to_index` to the end of these array-oriented methods. Pull Request: https://projects.blender.org/blender/blender/pulls/133730