Document unexpected list contents

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/cli/trunk@1440524 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

src/main/java/org/apache/commons/cli/Options.java

@@ -55,6 +55,8 @@ public class Options implements Serializable
     private Map<String, Option> longOpts = new LinkedHashMap<String, Option>();
 
     /** a map of the required options */
+    // N.B. This can contain either a String (addOption) or an OptionGroup (addOptionGroup)
+    // TODO this seems wrong
     private List<Object> requiredOpts = new ArrayList<Object>();
 
     /** a map of the option groups */