First version of explain. Creating a new parser was a wrong approach. Need to reimplement

src/core/builtin_helpers.py

@@ -2,7 +2,7 @@ import ast
 import logging
 
 import core.ast.nodes
-from core.ast.nodes import CallNodeConcept, GenericNodeConcept
+from core.ast.nodes import CallNodeConcept
 from core.ast.visitors import UnreferencedNamesVisitor
 from core.builtin_concepts import BuiltinConcepts
 from core.concept import Concept