This interface is used to control the flow of event listeners processing.
ItsNat provides a default implementation returned by {@link ItsNatEvent#getItsNatEventListenerChain()}.
Methods of this object must be called only inside the processing of an event listener and must not be saved beyond the lifetime of the related event.
Usually global event listeners and event listeners registered with {@link org.itsnat.comp.ItsNatComponent#addEventListener(String,org.w3c.dom.events.EventListener)}can benefit of this feature.
@author Jose Maria Arranz Santamaria