+But if one of the C<$spec>s begins with C<'+'>, the rule will replace I<all> default rules that apply to subclasses or subroles of C<$spec> (including C<$spec> itself).
+
+ # A mod stripper
+ my $strip = Tikz->functor(
+ # Replace all existent mod rules by this simple one
+ '+LaTeX::TikZ::Mod' => sub { return },
+ );
+ my $naked = $set->$strip;
+
+The functor will map unhandled sets and mods to themselves without cloning them, since it has no way to know how to do it.
+Thus, if you define your own L<LaTeX::TikZ::Set> or L<LaTeX::TikZ::Mod> object, be sure to register a default rule for it with the L</default_rule> method.
+
+=cut
+
+my @default_set_rules;
+my @default_mod_rules;