package ABC;
use Moose;

has 'container' => (
    is      => 'rw',
    isa     => 'ArrayRef',
    default => sub { return [ 0..10 ] },
    traits  => [ 'Array' ],
    handles => {
        get_piece_by_id => 'get',    # funktioniert
        # die folgenden funktionieren nicht
        get_color => sub {
            return shift->get_piece_by_id(0)->{color}->[0]; 
        }, 
        set_color => sub {
            shift->container->[0]->{color}->[0]) = shift; # leider kein set
        },
    },
);