Building an EdmModel with inheritance relationship between entities

Hi,

I can't seem to find the right way to build my Edm model with the following requirement :

• a base class and some derived ones, adding new specific properties

public class EntityA
{
    public Guid Id { get; set; }

    public string PropertyA { get; set; }
}

public class EntityB: EntityA
{
    public string PropertyB { get; set; }
}

• a controller for the whole inheritance chain, calling the default route would return a collection of EntityAs, the /B route a collection of EntityBs, and so on

[Route("[controller]")]
public class ControllerA : ODataController
{
    [HttpGet]
    [EnableQuery(PageSize = 12)]
    [ProducesResponseType(typeof(IQueryable<EntityA>), 200)]
    public Task<IActionResult> GetAllA()
    {
        IQueryable<EntityA> allA = someService.GetAllA();
        return allA;
    }

    [HttpGet("B")]
    [EnableQuery(PageSize = 12)]
    [ProducesResponseType(typeof(IQueryable<EntityB>), 200)]
    public Task<IActionResult> GetAllB()
    {
        IQueryable<EntityB> allB = someService.GetAllB();
        return allB;
    }
}

When I declare my Edm model using the ODataConventionModelBuilder, I cannot find a way to declare the GetAllB method as a Function on the EntitySet<EntityA> which returns a collection of EntityB.
Either I tell it it ReturnsCollection<EntityB>(), and then when the convention builder map the types hierarchy internally, it cannot register EntityB as an EntityType because it is already registered as a ComplexType, or I try to make a call to ReturnsCollectionFromEntitySet<>() but then I have to register a new EntitySet with a different name (which I think I understood will not match anymore with my odata/A/B route ?) or to bind it to the EntitySet<EntityA> and then OData sends me back the wrong type in the response's odata.context property (which I need to be exact to perform some client-side operations for displaying the data).

What did I miss ?