# SomeFramework.pm

package SomeFramework;

use Moose;
use MooX::ProtectedAttributes;

protected_has logger =>
(
    is  => 'ro',
    isa => 'SomeFramework::Logger',
);

sub log_trace
{
    my ($self, $msg) = @_;
    $self->logger->log_trace($msg);
}

1;