All commands must declare Unstructured or Internal

Callers must take a dependency on one or the other set of conversions
and default client behavior. Future changes may add a Versioned() type,
but this is an accurate reflection of current code state.

pkg/kubectl/cmd/clusterinfo.go

@@ -73,6 +73,7 @@ func RunClusterInfo(f cmdutil.Factory, out io.Writer, cmd *cobra.Command) error
 
 	// TODO use generalized labels once they are implemented (#341)
 	b := f.NewBuilder().
+		Internal().
 		NamespaceParam(cmdNamespace).DefaultNamespace().
 		LabelSelectorParam("kubernetes.io/cluster-service=true").
 		ResourceTypeOrNameArgs(false, []string{"services"}...).