Fixed variable recognition when it is a concept

src/core/sheerka/Sheerka.py

@@ -691,6 +691,9 @@ class Sheerka(Concept):
             return None
         return new_instances(concept) if return_new else concept
 
+    def fast_get_by_name(self, name):
+        return self.cache_manager.get(self.CONCEPTS_BY_NAME_ENTRY, name)
+
     def has_id(self, concept_id):
         """
         Returns True if a concept with this id exists in cache