Destructuring Arguments defaults

[zimt28]

I just learned that I can I can do

({prop1, prop2, prop3}) ->

This is great, but I'm used to doing

(optional = 'Default') ->

When I try to combine these two great things, it won't work.

({property, optional = 'Default'}) ->

I think this would be really nice to have, why isn't it implemented?

[vendethiel]

Duplicate of #2427.