Trait ChildRole 

pub trait ChildRole<Parent: Behavior> {
    type Child: Behavior;
    type Position: ChildPosition<<Parent::Birth as BirthMode>::Child, Self::Child>;
}

Static proof that Role names one exact direct child of Parent.

Behavior authoring owns this relationship. A runtime may use the proof to build application topology, but the role itself allocates nothing and is not evidence that the child was created or installed.

Required Associated Types

type Child: Behavior

The only child behavior accepted at this role.

type Position: ChildPosition<<Parent::Birth as BirthMode>::Child, Self::Child>

Structural position of this role in Parent’s closed child sum.

Implementors