How not to use methods

[mmierzwa]

Hi

I need a hint.

Provided I have such construction
    
    
    type Component = ref object of RootObj
    
    type Entity = ref object
      components = seq[Component]
    
    method update(c: Component) = discard
    

Then, I have components, like: 
    
    
    type Fighter = ref object of Component
    method update(c: Fighter) = discard
    

Finally
    
    
    for c in entity.components:
        c.update()
    

So it is quite common pattern. Collection of objects with common interface on 
which you perform some action. How can I preserve such functionality avoiding 
using methods (as I have heard core team do not like them).