[shadowdom] specificity of ::distributed()

Hey all,

I found myself wondering about ::distributed() specificity today. Do both
sides contribute somehow? I think these are all valid uses of
::distributed(), and if they all match the same element it would be useful
to know which of these wins out over the others:

1 - ::distributed(#id)
2 - ::distributed(.class)
3 - #id::distributed(#id)
4 - .class::distributed(#id)


Thanks,

Alan