docs: Documentation update

Change-Id: I6f916eb822a59e980e8fb1134886c3431755119c
diff --git a/utils/trie/detail/multi-policy-container.hpp b/utils/trie/detail/multi-policy-container.hpp
index cf2634f..5c3450b 100644
--- a/utils/trie/detail/multi-policy-container.hpp
+++ b/utils/trie/detail/multi-policy-container.hpp
@@ -20,6 +20,8 @@
 #ifndef MULTI_POLICY_CONTAINER_H_
 #define MULTI_POLICY_CONTAINER_H_
 
+/// @cond include_hidden
+
 #include <boost/mpl/inherit_linearly.hpp>
 #include <boost/mpl/at.hpp>
 
@@ -207,4 +209,6 @@
 } // ndn
 } // ns3
 
+/// @endcond
+
 #endif // MULTI_POLICY_CONTAINER_H_