diff --git a/src/schema.hpp b/src/schema.hpp
index 995d921..42d0728 100644
--- a/src/schema.hpp
+++ b/src/schema.hpp
@@ -63,10 +63,12 @@
     virtual yang::NodeTypes nodeType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual bool isModule(const std::string& name) const = 0;
     virtual bool listHasKey(const schemaPath_& location, const ModuleNodePair& node, const std::string& key) const = 0;
+    virtual bool listHasKey(const schemaPath_& listPath, const std::string& key) const = 0;
     virtual bool leafIsKey(const std::string& leafPath) const = 0;
     virtual bool isConfig(const std::string& path) const = 0;
     virtual std::optional<std::string> defaultValue(const std::string& leafPath) const = 0;
     virtual const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const = 0;
+    virtual const std::set<std::string> listKeys(const schemaPath_& listPath) const = 0;
     virtual yang::TypeInfo leafType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::TypeInfo leafType(const std::string& path) const = 0;
     virtual std::optional<std::string> leafTypeName(const std::string& path) const = 0;