visibility property
Implementation
static final RegExp visibility = RegExp(r'^(?<vis>\d{4})'
r'(?<dir>[NSEW]([EW])?)?|'
r'(M|P)?(?<integer>\d{1,2})?_?'
r'(?<fraction>\d/\d)?'
r'(?<units>SM|KM|M|U)|'
r'(?<cavok>CAVOK)$');
static final RegExp visibility = RegExp(r'^(?<vis>\d{4})'
r'(?<dir>[NSEW]([EW])?)?|'
r'(M|P)?(?<integer>\d{1,2})?_?'
r'(?<fraction>\d/\d)?'
r'(?<units>SM|KM|M|U)|'
r'(?<cavok>CAVOK)$');