void visit(Call *call) {
unsigned call_no = writer.beginEnter(call->sig, call->thread_id);
for (unsigned i = 0; i < call->args.size(); ++i) {
void visit(Call *call) {
unsigned call_no = writer.beginEnter(call->sig, call->thread_id);
for (unsigned i = 0; i < call->args.size(); ++i) {