EF IndexAnnotation included

I would like to define an index in EF modelbuilder that has an included column.

I can add columns that are part of an index like this (via the index annotation ):

base.Property(x => x.Col1).HasColumnAnnotation(
    IndexAnnotation.AnnotationName,
        new IndexAnnotation(
            new IndexAttribute("IX_MyIndex", 1) { IsUnique = false, IsClustered = false }));

base.Property(x => x.Col2).HasColumnAnnotation(
    IndexAnnotation.AnnotationName,
        new IndexAnnotation(
            new IndexAttribute("IX_MyIndex", 2) { IsUnique = false, IsClustered = false }));

      

        
        
        
      

    

but I want to generate something like the following:

CREATE NONCLUSTERED INDEX [MyIndex] ON [MyTable]
(
    [Col1] ASC
)
INCLUDE ([Col2])