package My::ABC

has 'db_accessor' => (
    is  => 'rw',
    isa => 'My::DEF',
);

##</code><code>##

around 'db_accessor => sub {
    my $orig = shift;
    my $self = shift;
    my $out;
    eval { $out = $self->$orig(@_) };
    if ($@) {
        $self->warn("Access failed with: [$@]");
    } else {
        return $out;
    }
};