Allows entities handled by the entity provider which implements this interface to have meta properties
attached to them, properties can be accessed via the
EntityBroker, properties will be
stored and retrieved using the internal entity property retrieval implementation
For our usage, meta properties are extra or additional properties that are attached to an entity
at runtime but are persisted so they can be retrieved later
WARNING: this should be used only for properties of entities which will be accessed very
lightly, for production level access OR the ability to control how properties are stored on your
own entities, you should use the
PropertyProvideable instead
This is one of the capability extensions for the
EntityProvider interface