3fccfe0bc6
Use `VectorSet`, `Vector` or `Span` instead of `SeqCollection` struct. It is now possible to use native `for` loops and `SEQ_ITERATOR_FOREACH` macro can be removed. Another feature is, sets of strips no longer needs to be freed. However, this poses a limitation, that query functions can not be used in case, where these sets need to be available outside of scope where they are created. Pull Request: https://projects.blender.org/blender/blender/pulls/111909