search method
Implementation
Iterable<Page> search(bool Function(Substitution) predicate) =>
map((p) => Page(p.day, p.subs.where(predicate).toList(), p.date));
Iterable<Page> search(bool Function(Substitution) predicate) =>
map((p) => Page(p.day, p.subs.where(predicate).toList(), p.date));