releaseAlt property
Release spring of the key's shape channel (corner morph), when it
differs from release: M3 Expressive releases its corners on
effectsDefault (no bounce, as Compose does) while the scale rides
800/0.6 (motion brief §2.3, §2.6 Motion.releaseAlt). Null: corners
follow release. The state layer (an effects channel) never
overshoots and always releases on an effects spring.
Implementation
final SpringDescription? releaseAlt;