It appears that Moose 'has' attribute requires the option 'is'. It goes gaga if I omit it.
Practically every number or string attribute I declare will be 'rw'.
How can I set a default for 'is' so I don't have to write it every time?
I checked out Moose::Meta::Attribute::Native, but if it tells me how to do that, I'm too stupid to understand it.