prev_sigs.cbegin(), prev_sigs.cend(),
[&](const shared_ptr<views::TraceView::Signal> &s) {
return s->base()->channel() == channel;
prev_sigs.cbegin(), prev_sigs.cend(),
[&](const shared_ptr<views::TraceView::Signal> &s) {
return s->base()->channel() == channel;