xo-objectd2 xo-printable xo-facet: pp working for List(Integer)

Also streamline facet switching

src/object2/IPrintable_DInteger.cpp

@@ -0,0 +1,28 @@
+/** @file IPrintable_DInteger.cpp
+ *
+ *  Generated automagically from ingredients:
+ *  1. code generator:
+ *       [/home/roland/proj/xo-umbrella2/xo-facet/codegen/genfacet]
+ *     arguments:
+ *       --input [idl/IPrintable_DInteger.json5]
+ *  2. jinja2 template for abstract facet .hpp file:
+ *       [iface_facet_any.hpp.j2]
+ *  3. idl for facet methods
+ *       [idl/IPrintable_DInteger.json5]
+**/
+
+#include "IPrintable_DInteger.hpp"
+
+namespace xo {
+    namespace scm {
+        auto
+        IPrintable_DInteger::pretty(const DInteger & self, const ppindentinfo & ppii) -> bool
+        {
+            return self.pretty(ppii);
+        }
+
+
+    } /*namespace scm*/
+} /*namespace xo*/
+
+/* end IPrintable_DInteger.cpp */