Implementation
static const Map<String, String> ALL_COUNTRIES_ALPHA_2 = {
"Afghanistan": "AF",
"Albania": "AL",
"Algeria": "DZ",
"American Samoa": "AS",
"Andorra": "AD",
"Angola": "AO",
"Anguilla": "AI",
"Antigua and Barbuda": "AG",
"Argentina": "AR",
"Armenia": "AM",
"Aruba": "AW",
"Australia": "AU",
"Austria": "AT",
"Azerbaijan": "AZ",
"Bahamas": "BS",
"Bahrain": "BH",
"Bangladesh": "BD",
"Barbados": "BB",
"Belarus": "BY",
"Belgium": "BE",
"Belize": "BZ",
"Benin": "BJ",
"Bermuda": "BM",
"Bhutan": "BT",
"Bolivia": "BO",
"Bosnia and Herzegovina": "BA",
"Botswana": "BW",
"Brazil": "BR",
"British Virgin Islands": "VG",
"Brunei Darussalam": "BN",
"Bulgaria": "BG",
"Burkina Faso": "BF",
"Burundi": "BI",
"Cambodia": "KH",
"Cameroon": "CM",
"Canada": "CA",
"Cape Verde": "CV",
"Central African Republic": "CF",
"Chad": "TD",
"Chile": "CL",
"China": "CN",
"Hong Kong": "HK",
"Macao": "MO",
"Colombia": "CO",
"Comoros": "KM",
"Congo": "CG",
"Costa Rica": "CR",
"C\u00f4te d'Ivoire": "CI",
"Croatia": "HR",
"Cuba": "CU",
"Cyprus": "CY",
"Czech Republic": "CZ",
"Denmark": "DK",
"Djibouti": "DJ",
"Dominica": "DM",
"Dominican Republic": "DO",
"Ecuador": "EC",
"Egypt": "EG",
"El Salvador": "SV",
"Equatorial Guinea": "GQ",
"Eritrea": "ER",
"Estonia": "EE",
"Ethiopia": "ET",
"European Union": "EU",
"Faroe Islands": "FO",
"Fiji": "FJ",
"Finland": "FI",
"France": "FR",
"French Guiana": "GF",
"French Polynesia": "PF",
"Gabon": "GA",
"Gambia": "GM",
"Georgia": "GE",
"Germany": "DE",
"Ghana": "GH",
"Greece": "GR",
"Greenland": "GL",
"Grenada": "GD",
"Guadeloupe": "GP",
"Guam": "GU",
"Guatemala": "GT",
"Guinea-Bissau": "GW",
"Haiti": "HT",
"Honduras": "HN",
"Hungary": "HU",
"Iceland": "IS",
"India": "IN",
"Indonesia": "ID",
"Iran (Islamic Republic of)": "IR",
"Iraq": "IQ",
"Ireland": "IE",
"Israel": "IL",
"Italy": "IT",
"Japan": "JP",
"Jordan": "JO",
"Kazakhstan": "KZ",
"Kenya": "KE",
"Kiribati": "KI",
"Korea": "KR",
"Kuwait": "KW",
"Kyrgyzstan": "KG",
"Lao PDR": "LA",
"Latvia": "LV",
"Lebanon": "LB",
"Lesotho": "LS",
"Liberia": "LR",
"Libya": "LY",
"Liechtenstein": "LI",
"Lithuania": "LT",
"Luxembourg": "LU",
"Madagascar": "MG",
"Malawi": "MW",
"Malaysia": "MY",
"Maldives": "MV",
"Mali": "ML",
"Malta": "MT",
"Marshall Islands": "MH",
"Martinique": "MQ",
"Mauritania": "MR",
"Mauritius": "MU",
"Mexico": "MX",
"Micronesia, Federated States of": "FM",
"Moldova": "MD",
"Monaco": "MC",
"Mongolia": "MN",
"Montenegro": "ME",
"Montserrat": "MS",
"Morocco": "MA",
"Mozambique": "MZ",
"Myanmar": "MM",
"Namibia": "NA",
"Nauru": "NR",
"Nepal": "NP",
"Netherlands": "NL",
"Netherlands Antilles": "AN",
"New Caledonia": "NC",
"New Zealand": "NZ",
"Nicaragua": "NI",
"Niger": "NE",
"Nigeria": "NG",
"Northern Mariana Islands": "MP",
"Norway": "NO",
"Oman": "OM",
"Pakistan": "PK",
"Palau": "PW",
"Palestinian Territory": "PS",
"Panama": "PA",
"Papua New Guinea": "PG",
"Paraguay": "PY",
"Peru": "PE",
"Philippines": "PH",
"Pitcairn": "PN",
"Poland": "PL",
"Portugal": "PT",
"Puerto Rico": "PR",
"Qatar": "QA",
"R\u00e9union": "RE",
"Romania": "RO",
"Russian Federation": "RU",
"Rwanda": "RW",
"Saint Kitts and Nevis": "KN",
"Saint Lucia": "LC",
"Saint Vincent and Grenadines": "VC",
"Samoa": "WS",
"San Marino": "SM",
"Sao Tome and Principe": "ST",
"Saudi Arabia": "SA",
"Senegal": "SN",
"Serbia": "RS",
"Seychelles": "SC",
"Sierra Leone": "SL",
"Singapore": "SG",
"Slovakia": "SK",
"Slovenia": "SI",
"Solomon Islands": "SB",
"Somalia": "SO",
"South Africa": "ZA",
"Spain": "ES",
"Sri Lanka": "LK",
"Sudan": "SD",
"Suriname": "SR",
"Swaziland": "SZ",
"Sweden": "SE",
"Switzerland": "CH",
"Syrian Arab Republic": "SY",
"Taiwan (Province of China)": "TW",
"Tajikistan": "TJ",
"Tanzania": "TZ",
"Thailand": "TH",
"Timor-Leste": "TL",
"Togo": "TG",
"Tonga": "TO",
"Trinidad and Tobago": "TT",
"Tunisia": "TN",
"Turkey": "TR",
"Turkmenistan": "TM",
"Tuvalu": "TV",
"Uganda": "UG",
"Ukraine": "UA",
"United Arab Emirates": "AE",
"United Kingdom": "GB",
"United States of America": "US",
"Uruguay": "UY",
"Uzbekistan": "UZ",
"Vanuatu": "VU",
"Venezuela": "VE",
"Viet Nam": "VN",
"Virgin Islands, US": "VI",
"Yemen": "YE",
"Zambia": "ZM",
"Zimbabwe": "ZW"
};