use MooseX::AttributeHelpers::Trait::Collection::Array;
use MooseX::AttributeHelpers::Trait::Collection::Hash;
use MooseX::AttributeHelpers::Trait::Collection::ImmutableHash;
+use MooseX::AttributeHelpers::Trait::Collection::Bag;
use MooseX::AttributeHelpers::Counter;
use MooseX::AttributeHelpers::Number;