override in derived classes, enforce it by wrapping the page specific code in
a new virtual method, which the derived classes can override and PageLeave can
call before its own logic.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
prevent them from being serialised alongside the API properties. This will also
be useful for moving the API bindings out of XenModel.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>