- const blockedCountries = new Set(board.settings.blockedCountries);
select(name='countries' size='10' multiple)
	optgroup(label=__('Currently blocked'))
		each code in board.settings.blockedCountries
			option(value=code selected=true) #{countryNamesMap[code]} (#{code})
	optgroup(label=__('Not blocked'))
		each code in countryCodes.filter(c => !blockedCountries.has(c))
			option(value=code) #{countryNamesMap[code]} (#{code})