Rename leafrefBase to leafrefBaseType

leafrefBase could also mean the path of leafref and that's kind of
misleading.

Change-Id: I56e0b0edd0f21d5ca289ad9cfc4e056d79f6bed0
diff --git a/src/schema.hpp b/src/schema.hpp
index ef90542..561455c 100644
--- a/src/schema.hpp
+++ b/src/schema.hpp
@@ -76,7 +76,7 @@
     virtual const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::LeafDataTypes leafType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::LeafDataTypes leafType(const std::string& path) const = 0;
-    virtual yang::LeafDataTypes leafrefBase(const schemaPath_& location, const ModuleNodePair& node) const = 0;
+    virtual yang::LeafDataTypes leafrefBaseType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual std::optional<std::string> description(const std::string& location) const = 0;
     virtual std::optional<std::string> units(const std::string& location) const = 0;