Moved the TranslationUnit property from DeclarationContext to Declaration.

src/AST/Declaration.cs

@@ -54,6 +54,16 @@ namespace CppSharp.AST
             }
         }
 
+        public TranslationUnit TranslationUnit
+        {
+            get
+            {
+                if (this is TranslationUnit)
+                    return this as TranslationUnit;
+                return Namespace.TranslationUnit;
+            }
+        }
+
         private string name;
         public virtual string OriginalName
         {

src/AST/Namespace.cs

@@ -24,17 +24,6 @@ namespace CppSharp.AST
         // Used to keep track of anonymous declarations.
         public Dictionary<ulong, Declaration> Anonymous; 
 
-        public TranslationUnit TranslationUnit
-        {
-            get
-            {
-                if (this is TranslationUnit)
-                    return this as TranslationUnit;
-                else
-                    return Namespace.TranslationUnit;
-            }
-        }
-
         protected DeclarationContext()
         {
             Namespaces = new List<Namespace>();