Error: mutable method isolated.graphics.g3d.model.Model.begin is not callable using a const object

[Alex Parrill via Digitalmars-d-learn]

On Monday, 6 June 2016 at 20:40:12 UTC, Begah wrote:
> I have a pretty weird error : Error: mutable method 
> isolated.graphics.g3d.model.Model.begin is not callable using a 
> const object
>
> [...]

It may infer const from the type of `this.instance`, which may be 
further modified if the method you are running this in is 
`const`. If you explicitly specify the type of the foreach loop 
variables, does it work?