should be used for interaction to handle states of unknown filter during detection
If during loading time the filter can't be detected and wasn't given at calling time,
a possible ::com::sun::star::task::InteractionHandler will be used.
(it's a a part of used ::com::sun::star::document::MediaDescriptor )
Such "NoSuchFilterRequest" will be used then to start right interaction on that to
get a decision wich filter should be used for given URL. A possible continiuation
of type ::com::sun::star::document::XInteractionFilterSelect will transport this decision back to
generic filter detection and force using of it. Of course it's possible to abort
the loading process by use another continuation ::com::sun::star::task::XInteractionAbort .