This bean describes the watcher list. Apart from an expandable list of watchers, this bean also holds a link to the
watchers sub-resource, and a boolean indicating whether the current user is watching the issue.
(String selfUri, Boolean watching, List<UserBean> userBeans, int count)
Creates a new SimpleListWrapper backed by the given list and returns at most maxResults items to the client.
|a Boolean indicating whether the user is watching the issue
|the number of watcher (if the user does not have View Watchers permission then userBeans will be empty but count can be non-zero, so we can't just use userBeans.size())
(String selfUri, Boolean watching, int count)