1 files changed, 10 insertions, 0 deletions
diff --git a/src/dotnode.h b/src/dotnode.h
index dd42637..2eb3f7d 100644
--- a/src/dotnode.h
+++ b/src/dotnode.h
@@ -17,6 +17,8 @@
 #define DOTNODE_H
 
 #include <vector>
+#include <map>
+#include <deque>
 
 #include "dotgraph.h"
 
@@ -128,4 +130,12 @@ class DotNode
     int              m_subgraphId = -1;
 };
 
+class DotNodeMap : public std::map<std::string,DotNode*>
+{
+};
+
+class DotNodeDeque : public std::deque<DotNode*>
+{
+};
+
 #endif