1.1.5.3. optin.osx.cocoa.localizability.EmptyLocalizationContextChecker (ObjC)
Check that NSLocalizedString macros include a comment for context.

Examples:

- (void)test {
  NSString *string = NSLocalizedString(@"LocalizedString", nil); // warn
  NSString *string2 = NSLocalizedString(@"LocalizedString", @" "); // warn
  NSString *string3 = NSLocalizedStringWithDefaultValue(
    @"LocalizedString", nil, [[NSBundle alloc] init], nil,@""); // warn
}