+ * @param group Group to use (and add to the groups stack).
+ * @todo Add an example.
+ */
+ function pushGroup($group = '')
+ {
+ trigger_error('Not implemented!', E_USER_ERROR);
+ }
+
+ /**
+ * Removes the current group from the groups stack and returns it.
+ *
+ * @return Last used group.
+ * @todo Add an example.
+ */
+ function popGroup() {
+ trigger_error('Not implemented!', E_USER_ERROR);
+ }
+
+ /**
+ * Returns the current group from the groups stack.