CHRRuleset ruleset = new CHRRuleset();
ruleset.location = Locations.combine(statements.get(begin).location, statements.get(end-1).location);
for(int i=begin;i<end;++i) {
Statement statement = statements.get(i);
if(statement instanceof CHRStatement)
CHRRuleset ruleset = new CHRRuleset();
ruleset.location = Locations.combine(statements.get(begin).location, statements.get(end-1).location);
for(int i=begin;i<end;++i) {
Statement statement = statements.get(i);
if(statement instanceof CHRStatement)