```ruby
require 'spree_core'
require 'spree_multi_vendor/engine'
require 'spree_multi_vendor/version'
require 'spree_extension'
require 'deface'

module SpreeMultiVendor
  # TODO: this should be moved into preferences
  def self.vendorized_models
    SpreeMultiVendor::Config[:vendorized_models].map(&:classify).map { |class_name| "Spree::#{class_name}".constantize }
  end
end
```

Use safe_constantize in case someone want's to vendorize non-existing model
user
```ruby
require 'spree_core'
require 'spree_multi_vendor/engine'
require 'spree_multi_vendor/version'
require 'spree_extension'
require 'deface'

module SpreeMultiVendor
  # TODO: this should be moved into preferences
  def self.vendorized_models
    SpreeMultiVendor::Config[:vendorized_models].map(&:classify).map do |class_name|
      "Spree::#{class_name}".safe_constantize
    end.compact.uniq
  end
end
```
assistant