         
         let value1 = Value([
             "string": Value("success"),
-            "custom": Value(CustomValue1()),
+            "custom": Value(CustomValue1(name: "custom1")),
             "f": Value(filter1)
             ])
         let rendering1 = template.render(value1)!

        
        let value2 = Value([
            "string": Value("success"),
            "custom": Value(CustomValue2()),
            "f": Value(filter2)
            ])
        let rendering2 = template.render(value2)!

        
        // A cluster
        struct CustomValue3: Cluster {
            let name: String
            let mustacheBool = true
            var mustacheTraversable: Traversable? = nil
            let mustacheFilter: Filter? = nil
            let mustacheTagObserver: TagObserver? = nil
            let mustacheRenderable: Renderable? = nil
            
            init(name: String) {
                self.name = name
            }
            
            func valueForMustacheIdentifier(identifier: String) -> Value? {
                return Value()
            }
