@Override public Set<Statement> gather(final IGASState<Set<Statement>,Set<Statement>,Set<Statement>> state,final Value u,final Statement e){
  return Collections.singleton(e);
}

@ Override public Set < Statement > gather ( final IGASState < Set < Statement > , Set < Statement > , Set < Statement > > state , final Value u , final Statement e ) { return Collections . singleton ( e ) ; }
return the edge as a singleton set .
