AE needs a "Edge Extend" Effect to remove dark or contaminated outlines of Keys and Rotos!

After Effects really needs a native “Edge Extend” effect, like Nuke’s EdgeExtend or the AE plugin Extendo, that takes the clean color from inside a matted object and pushes that RGB outward into the soft edge region so dark, contaminated, haloed, or premult-damaged fringe pixels are replaced with colors that actually match the object. This would make it much easier to fix ugly edge artifacts in greenscreen, roto, hair, motion blur, semi-transparent details, spill, and premult cleanup.