* 'help-messages' -- array of message keys/objects. As above, each item can
* be an array of msg key and then parameters.
* Overwrites 'help'.
+ * 'notice' -- message text for a message to use as a notice in the field.
+ * Currently used by OOUI form fields only.
+ * 'notice-messages' -- array of message keys/objects to use for notice.
+ * Overrides 'notice'.
+ * 'notice-message' -- message key or object to use as a notice.
* 'required' -- passed through to the object, indicating that it
* is a required field.
* 'size' -- the length of text fields