[namedgraphs] NamedGraphSet to extend Iterable

[Tim P. <tim...@ou...>]

Hi, 

for convenience would it be nice for NamedGraphSet to extend Iterable?

It is trivial: 

  public Iterator<NamedGraph> iterator() {
    return listGraphs();
  }

though puting it in NamedGraphSetIO might be a bit ugly. 


Tim