C<tag>
Returns an identifier for the mod object.
-It is used to gather mods together when calling C<cover> on them.
+It is used to gather mods together when calling C<covers> on them.
=item *
-C<cover $mod>
+C<covers $mod>
Returns true if and only if the effects of the mod C<$mod> are already ensured by the current mod object, in which case no actual TikZ code will be emitted for C<$mod>.
Both mod objects are guaranteed to have the same C<tag>.
requires qw(
tag
- cover
+ covers
declare
apply
);