has 'country' => (
    is        => 'rw',
    reader    => 'get_country',
    writer    => 'set_country',
    predicate => 'has_country',
    clearer   => 'clear_country',
    trigger   => sub {
                 my ($self)  = @_;
                     if ( $self->get_country eq '' || not defined($self->get_country) ) {
                         $self->clear_country;
                     }
                 }
);