[ast] QualifiedType in ITypedDecl is now a setter.

src/AST/Declaration.cs

@@ -12,7 +12,7 @@ namespace CppSharp.AST
     public interface ITypedDecl
     {
         Type Type { get; }
-        QualifiedType QualifiedType { get; }
+        QualifiedType QualifiedType { get; set; }
     }
 
     public interface INamedDecl

src/AST/Function.cs

@@ -259,6 +259,10 @@ namespace CppSharp.AST
         }
 
         public Type Type => ReturnType.Type;
-        public QualifiedType QualifiedType => ReturnType;
+        public QualifiedType QualifiedType
+        {
+            get { return ReturnType; }
+            set { ReturnType = value; }
+        }
     }
 }