lerp method
Linearly interpolate between two UserAvatar themes.
All the properties must be non-null.
Implementation
AvatarThemeData lerp(
AvatarThemeData a,
AvatarThemeData b,
double t,
) =>
AvatarThemeData(
borderRadius: BorderRadius.lerp(a.borderRadius, b.borderRadius, t),
constraints: BoxConstraints.lerp(a.constraints, b.constraints, t),
);