UseAsDataSourceWithGroupBy.cs

static void Main(string[] args)
{
	Mapper.Initialize(cfg =>
	{
		cfg.CreateMissingTypeMaps = true;
		cfg.ValidateInlineMaps = false;
		cfg.CreateMap<Model, ModelDto>();
	});
	
	System.Collections.Generic.List<Model> models = new List<Model> { new Model(),new Model() };
	
	models.AsQueryable().UseAsDataSource().For<ModelDto>().GroupBy(x => x.Id).Dump();
}

public class Model
{
	public int Id { get; set; }
}

public class ModelDto
{
	public int Id { get; set; }
}