Man pages matching name html::formfu::constraint::bool in section 3pm:

HTML::FormFu::Constraint::Bool.3pm.en	debian 10 / libhtml-formfu-perl
HTML::FormFu::Constraint::Bool.3pm.en	debian 11 / libhtml-formfu-perl
HTML::FormFu::Constraint::Bool.3pm.en	debian 12 / libhtml-formfu-perl