add leaves

Change-Id: I962bb4e74f39ec0a838f984b8c13a420ba36d7ce
diff --git a/src/main.cpp b/src/main.cpp
index 4fb9d8d..df4c925 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -49,7 +49,9 @@
     Schema schema;
     schema.addContainer("", "a", yang::ContainerTraits::Presence);
     schema.addContainer("", "b");
+    schema.addLeaf("", "leaf");
     schema.addContainer("a", "a2");
+    schema.addLeaf("a", "leafa");
     schema.addContainer("b", "b2", yang::ContainerTraits::Presence);
     schema.addContainer("a/a2", "a3", yang::ContainerTraits::Presence);
     schema.addContainer("b/b2", "b3");