Question about NopObjectContext

Hello,
I'm looking through NopCommerce solution (3.7) and I noticed that NopObjectContext in Nop.Data has NO properties like

public DbSet<Customer> Customers { get; set; }
public DbSet<Product> Products { get; set; }
...

AFAIK in Entity Framework projects (code-first, database-first) usually DbContext properties are mapped to database tables.

I wonder what is the approach taken in NopCommerce

Regards,
Albert

nopCommerce has another layer of extraction, that is the Repository. Since you have the source code, just look at how other repositories are coded. :)