code: public void find(Handler<ChangesetInfo> handler, QueryChangesetsFilters filters)
  	{
  		String query = filters != null ? "?" + filters.toParamString() : "";
  		try
  		{
  			osm.makeAuthenticatedRequest(CHANGESET + "s" + query, null, new ChangesetParser(handler));
  		}
  		catch(OsmNotFoundException e)
  		{
  			// ok, we are done (ignore the exception)
  		}
  	}
docs: Get a number of changesets that match the given filters.
  
  @param handler The handler which is fed the incoming changeset infos
  @param filters what to search for. I.e.
  new QueryChangesetsFilters().byUser(123).onlyClosed()
  
  @throws OsmAuthorizationException if not logged in