lerp static method
Implementation
static OkLAB lerp(OkLAB start, OkLAB end, double fraction) {
return OkLAB(
lerpDouble(start.l, end.l, fraction) ?? 0,
lerpDouble(start.a, end.a, fraction) ?? 0,
lerpDouble(start.b, end.b, fraction) ?? 0,
);
}