We need some logic to be done before/after call of renderer for direct area rendering implementation, see MAGNOLIA-4126. Although we have tried several places where it can be done, we agreed on usage of listeners, see DAR review II.
Such set of listener is called before/after every call of render and we can reuse listeners in the future for different purposes (for example push/pop actions can be called in appropriate listeners).

• Register such listener in rendering engine config (RenderingContext).
• New instance of such listener per request.
• Registering of multiple listeners is possible.
• Listener is registered and instantiated by rendering engine and passed into rend. context.