Is it possible to extend family?

I have these families:

val Placeable: Family = Family.all(
            NavigationComponent.Position::class.java,
            NavigationComponent.Rotation::class.java
).get()

val Movable: Family = Family.all(
            NavigationComponent.Position::class.java,
            NavigationComponent.Rotation::class.java,
            MovementComponent.MoveSpeed::class.java,
            MovementComponent.MoveInfo::class.java
).get()

is there any way to make Movable something like this?

val Movable: Family = Family.all(
            *Placeable.components,
            MovementComponent.MoveSpeed::class.java,
            MovementComponent.MoveInfo::class.java
).get()

The issue names the Family API and the Placeable and Movable component lists; start by inspecting how Family.all accepts component classes and whether an existing Family can expose those classes. Define done as supporting composition of Placeable's components with additional components, with coverage for the resulting Movable family.