public class Processor<T, TEntity, TEntityKey> where T : BaseFileEntity<TEntity> where TEntity : class, IEntity<TEntityKey>
{
    public Processor(
        IRetriever<T, TEntity, TEntityKey> dataRetriever,
        IGenerator<T, TEntity> fileGenerator)
}


public interface IRetriever<T, TEntity, TEntityKey> where T : BaseFileEntity<TEntityKey> where TEntity : class, IEntity<TEntityKey>
{

}

public interface IGenerator<T, TEntityKey> where T : BaseFileEntity<TEntityKey>
{

}