in src/main/java/aws/cfn/codegen/json/Config.java [172:180]
private void validateRegionSpecs() {
if (settings != null && !specifications.isEmpty()) {
for (String r: settings.getRegions()) {
if (!specifications.containsKey(r)) {
throw new IllegalArgumentException("No regions mapping was found " + settings.getRegions());
}
}
}
}