Struct InitializationTurn 

pub struct InitializationTurn { /* private fields */ }

Capability for defining one initialization fold.

The constructor is private, so callers cannot pass a fabricated turn to Behavior::init. The public initialize composition port can issue a turn more than once for the same mutable definition. A wrapper or runtime using that port must enforce its own initialization order; the consuming Activate::initialize path in behavior-actors enforces one call for its owned definition.