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+balanced-observers
+==================
+
+Checks that for every occurrence of ``addObserver`` there is an
+occurrence of ``removeObserver`` with the same topic.
+
+Examples of incorrect code for this rule:
+-----------------------------------------
+
+.. code-block:: js
+
+    Services.obs.addObserver(observer, 'observable');
+
+Examples of correct code for this rule:
+---------------------------------------
+
+.. code-block:: js
+
+    Services.obs.addObserver(observer, 'observable');
+    Services.obs.removeObserver(observer, 'observable');