Putting things in an enum's scope

[pineapple via Digitalmars-d-learn]

Is there any way in D to define static methods or members within 
an enum's scope, as one might do in Java? It can sometimes help 
with code organization. For example, this is something that 
coming from Java I'd have expected to be valid but isn't:

enum SomeEnum{
     NORTH, SOUTH, EAST, WEST;

     static int examplestaticmethod(in int x){
         return x + 2;
     }
}

int z = SomeEnum.examplestaticmethod(2);