findEither(TripleMatch m, boolean showHidden) Answer an iterator over the reification triples of this Reifier, or an empty
iterator - if showHidden is false, only the exposed triples, otherwise only
the concealed ones.
findExposed(TripleMatch m) Answer an iterator over all the reification triples that this Reifier exposes
(ie all if Standard, none otherwise) that match m.
Answer an iterator over the reification triples of this Reifier, or an empty
iterator - if showHidden is false, only the exposed triples, otherwise only
the concealed ones.