@Override
          public void visitPyReferenceExpression(@NotNull PyReferenceExpression node) {
            if (Comparing.equal(node.asQualifiedName(), oldQualifiedName)) {
              replaceWithQualifiedExpression(node, newName);
            }
            else {
              super.visitPyReferenceExpression(node);
            }
          }
@Override
          public void visitPyReferenceExpression(@NotNull PyReferenceExpression node)