use v5.10;

package Padre::Document;
use Moose;
sub event_key_up { say "event_key_up fired"; }
no Moose;
1;

package NeedsKeyUpEvent;
use Moose::Role;
requires 'event_key_up';
before 'event_key_up' => sub { say q{before event_key_up}; };
after 'event_key_up'  => sub { say q{after event_key_up}; };
no Moose::Role;
1;

package main;
my $p = Padre::Document->new;
NeedsKeyUpEvent->meta->apply($p);
$p->event_key_up;
say "-----";
my $q = Padre::Document->new;
$q->event_key_up;

=>

before event_key_up
event_key_up fired
after event_key_up
-----
event_key_up fired