diff --git a/src/Composite.cpp b/src/Composite.cpp
index f5492351..40563187 100644
--- a/src/Composite.cpp
+++ b/src/Composite.cpp
@@ -61,8 +61,13 @@ void Composite::add (
 ////////////////////////////////////////////////////////////////////////////////
 // overlay == true    means there is no color blending.
 // overlay == false   means there is color blending.
-std::string Composite::str (bool overlay)
+std::string Composite::str (bool overlay) const
 {
+  // TODO Find the longest string.
+  // TODO Create a vector of ints the same length, where each int is the index.
+
+
+
   return "";
 }
 
diff --git a/src/Composite.h b/src/Composite.h
index 620b170a..f6ba9e1d 100644
--- a/src/Composite.h
+++ b/src/Composite.h
@@ -37,7 +37,7 @@ class Composite
 public:
   Composite () = default;
   void add (const std::string&, std::string::size_type, const Color&);
-  std::string str (bool overlay = true);
+  std::string str (bool overlay = true) const;
 
 private:
   std::vector <std::tuple <std::string, std::string::size_type, Color>> _layers;