* Create a new Entity::Id. * * Emits EntityCreatedEvent. */

Operator to add a new function or lambda as signal handler, returns a handler connection ID.

* Number of managed entities. */

Operator to remove a signal handler through it connection ID, returns if a handler was removed.

Emit a signal, i.e. invoke all its callbacks and collect return types with the Collector.

* Current entity capacity. */

Result was a success, or failure is suppressed

Ensure at least n elements will fit in the pool.

Return number of signals connected to this receiver.

* Create an Entity::Id for a slot. * * NOTE: Does *not* check for validity, but the Entity::Id constructor will * fail if the ID is invalid.

!TBD We need to do this another way!