AxpRegionConstants: {
    ASIA_PACIFIC: string;
    AUSTRALIA: string;
    CANADA: string;
    EUROPE: string;
    NORTH_AMERICA: string;
    SOUTH_AMERICA: string;
    UNITED_KINGDOM: string;
}

Constants related to AxpRegion. These regions were present at the time of writing this code. It is not mandatory that user can send only provided regions. In future if any new region is added, user can send that region as well without using AxpRegionConstants.