Add Schema::nodeType method

Change-Id: Id17e00ebef4820abae3b66d2e262be4b16c7a672
diff --git a/src/yang_schema.hpp b/src/yang_schema.hpp
index 1ff5144..dd88145 100644
--- a/src/yang_schema.hpp
+++ b/src/yang_schema.hpp
@@ -32,6 +32,8 @@
 
     bool isContainer(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool isLeaf(const schemaPath_& location, const ModuleNodePair& node) const override;
+    yang::NodeTypes nodeType(const std::string& path) const override;
+    yang::NodeTypes nodeType(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool isModule(const std::string& name) const override;
     bool isList(const schemaPath_& location, const ModuleNodePair& node) const override;
     bool isPresenceContainer(const schemaPath_& location, const ModuleNodePair& node) const override;