Devel::Events::Filter::Callback - Callback based Devel::Events::Filter

	use Devel::Events::Filter::Callback;

	Devel::Events::Filter::Callback->new(
		callback => sub {
			my ( @event ) = @_;

			return if bad_event(@event); # drop it

			return map { filter($_) } @event; # change it
		},
		handler => $handler,
	);

Duh.

handler

Devel::Events::Handler

callback

a code ref

filter_event

Delegates to callback