description: > Empty interface to indicate that the associated `Software.Version` should prevent a state transition of the associated managed element while the `Software.Version` is in `Activating` state. The specific state transition(s) to prevent are left to the implementation. A typical use of this would be to prevent (delay) the power-on of a managed host while the BIOS is being updated. The managed host, via systemd transitions, might start the power-on sequence and then wait for any object with this `ActivationBlocksTransition` interface to no longer be in `Activating` state. Causal ordering of dbus operations can prove that no update is currently being performed and the power-on sequence may safely continue.