Service contracts for depending modules

[Serializator]

Service contracts allow depending modules to depend on the interface of the redirect model and it's respective repository instead of its concrete implementation.

Service contract design patterns | Magento 2 Developer Documentation

Interfaces can also be used in classes owned by the module itself to keep a clean and more readable codebase by using the repository interface instead of a factory or collection for example to load one or more redirect models directly.

Suggested interfaces
WeProvide\NginxRedirect\Api\Data\RedirectInterface
WeProvide\NginxRedirect\Api\RedirectRepositoryInterface