Add node-info getters to Schema

Change-Id: Iffea96cdcf20763286db19b0ee2b92dbf7c69b6c
diff --git a/src/static_schema.hpp b/src/static_schema.hpp
index c2623a5..a63f92c 100644
--- a/src/static_schema.hpp
+++ b/src/static_schema.hpp
@@ -61,6 +61,8 @@
     const std::set<std::string> validIdentities(const schemaPath_& location, const ModuleNodePair& node, const Prefixes prefixes) const override;
     std::set<std::string> childNodes(const schemaPath_& path, const Recursion) const override;
     std::set<std::string> moduleNodes(const module_& module, const Recursion recursion) const override;
+    std::optional<std::string> description(const std::string& path) const override;
+    std::optional<std::string> units(const std::string& path) const override;
 
     void addContainer(const std::string& location, const std::string& name, yang::ContainerTraits isPresence = yang::ContainerTraits::None);
     void addLeaf(const std::string& location, const std::string& name, const yang::LeafDataTypes& type);