Question, what are the Interfaces for?

[dotaxel]

Watching the flixel source, i've noticed interfaces like IFlxBasic, IFlxObject and IFlxSprite exists, but why?
It doesn't get used on any flixel class as i have seen... so whats the point of having them? Also if they exist then why don't we implement them in its classes? By example, implement IFlxSprite in the FlxSprite class..

Again, this is a question !!

[Jaduplex]

You use them to implement basic flixel functionality into new classes without outright extending them.

[Geokureli]

They are only really used in FlxParticle and IFlxUIWidget. Flixel-UI is deprecated, and I would accept a PR to deprecate IFlxBasic, IFlxObject and IFlxSprite and move any necessary fields to IFlxParticle. Honestly, there's probably a better way to hsndle particles than with an interface

Having an interface for these foundational classes is only a source of pain and rigidity

Edit: #3598