BEGIN {
    use MooseX::Declare;

    class Foo {
        use feature qw(say);

        use Data::Dumper;

        use MooseX::MultiMethods;
        use MooseX::Types -declare => [qw(Bar MyStr MyNum)];
        use MooseX::Types::Moose qw(Str Num);
        use MooseX::Types::Structured qw(Dict);

        BEGIN {
            subtype MyStr,
                as Str;
            subtype MyNum,
                as Num;

            subtype Bar,
                as Dict[
                    string => MyStr,
                    number => MyNum,
                ],
                message { 'Invalid Foo struct' };
        };

        multi method baz(Bar $barrr) {
            say'Bar';
            say Dumper $barrr
        }

        multi method baz(Str $string) {
            say 'Str';
            say Dumper $string;
        }
    }

}
no Moose;
no MooseX::Declare;

1;

package main;

my $foo = Foo->new;
$foo->baz( { string => 'hello', number => 1.00, } );
$foo->baz( 'hello world' )
[download]