```ruby
require 'bson'

module Toy
  module Identity
    class ObjectIdKeyFactory < AbstractKeyFactory
      def key_type
        BSON::ObjectId
      end

      def next_key(object)
        BSON::ObjectId.new
      end
    end
  end
end

class BSON::ObjectId
  def self.to_store(value, *)
    return value if value.is_a?(BSON::ObjectId)
    BSON::ObjectId.from_string(value.to_s)
  end

  def self.from_store(value, *)
    value
  end
end```

Make BSON::ObjectId to_store and from_store work the same.
user
```ruby
require 'bson'

module Toy
  module Identity
    class ObjectIdKeyFactory < AbstractKeyFactory
      def key_type
        BSON::ObjectId
      end

      def next_key(object)
        BSON::ObjectId.new
      end
    end
  end
end

class BSON::ObjectId
  def self.to_store(value, *)
    return value if value.is_a?(BSON::ObjectId)
    BSON::ObjectId.from_string(value.to_s)
  end

  def self.from_store(value, *args)
    to_store(value, *args)
  end
end```
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