Constant seaplane_cli::cli::specs::REGION_SPEC

pub const REGION_SPEC: &'static str = "REGION SPEC

    The regions are based on ISO 3166 alpha-2 continent codes with a few additions to capture
    regulatory differences along with some more intuitive or common aliases. The currently
    supported mappings are:

    XA => Asia
    XC => PRC => PeoplesRepublicofChina
    XE => EU  => Europe
    XF => Africa
    XN => NAmerica => NorthAmerica
    XO => Oceania
    XQ => Antarctica
    XS => SAmerica => SouthAmerica
    XU => UK => UnitedKingdom

    This list is subject to change or expand.";