A simple type library demonstrating Dict with optional arguments

Foo.pm

package Foo;

use Type::Library -base;
use Type::Utils qw( as declare );
use Types::Standard qw( Dict HashRef Int slurpy );

declare Params, as Dict[ id => Int, slurpy HashRef ];

1;

foo.t

use Test2::V0;
use Foo qw( is_Params );

ok( is_Params({ id => 1 }), 'should be a valid Params' );
ok( is_Params({ id => 1, code => 2 }), 'should be a valid Params' );

done_testing();