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=head1 UPGRADING FROM BEFORE 4.0.0
This documentation notes internals changes between the 3.8 and 4.0
series that are primarily of interest to developers writing extensions
or local customizations. It is not an exhaustive list.
=over
=item *
The deprecated classes RT::Action::Generic, RT::Condition::Generic and
RT::Search::Generic have been removed, but you shouldn't have been using them
anyway. You should have been using RT::Action, RT::Condition and RT::Search,
respectively.
=item *
The menu system has been reworked significantly; the C<Privileged> and
C<Unprivileged> callbacks in C<Elements/Tabs>, along with
L<RT::Interface::Web::Menu>, comprise the new menuing hooks.
=back
=cut
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