package Moo::Role::DBIConnection {
    use Moo::Role;
    use DBI;
    use Types::DBI;
    has dbh => (is => 'ro', isa => Dbh, required => 1, coerce => 1);
};

##</code><code>##

package Moo::Role::DBIConnection {
    use Moo::Role;
    use DBI;
    use Types::DBI;
    use Types::Standard qw(HashRef);
    has dbh => (
        is         => 'ro',
        isa        => Dbh->plus_coercions(HashRef, sub { DBI->connect(@{$_}{qw/dsn user password options/}) }),
        required   => 1,
        coerce     => 1,
    );
};