Add enum completion

Change-Id: I5ee7d6359812535d0eef9f70e1b66e205d93cf39
diff --git a/src/static_schema.hpp b/src/static_schema.hpp
index 7326120..d07852e 100644
--- a/src/static_schema.hpp
+++ b/src/static_schema.hpp
@@ -33,6 +33,7 @@
     bool nodeExists(const std::string& location, const std::string& node) const override;
     const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const override;
     yang::LeafDataTypes leafType(const schemaPath_& location, const ModuleNodePair& node) const override;
+    const std::set<std::string> enumValues(const schemaPath_& location, const ModuleNodePair& node) const override;
     std::set<std::string> childNodes(const schemaPath_& path, const Recursion) const override;
 
     void addContainer(const std::string& location, const std::string& name, yang::ContainerTraits isPresence = yang::ContainerTraits::None);