addLoopToCurrent example

array_unshift($this->loopsTargets, $node->getNode('key_target')->getAttribute('name'));
        } elseif (!$this->loops) {
            // we are outside a loop             return;
        }

        // when do we need to add the loop variable back?
        // the loop variable is referenced for the current loop         elseif ($node instanceof NameExpression && 'loop' === $node->getAttribute('name')) {
            $node->setAttribute('always_defined', true);
            $this->addLoopToCurrent();
        }

        // optimize access to loop targets         elseif ($node instanceof NameExpression && \in_array($node->getAttribute('name'), $this->loopsTargets)) {
            $node->setAttribute('always_defined', true);
        }

        // block reference         elseif ($node instanceof BlockReferenceNode || $node instanceof BlockReferenceExpression) {
            $this->addLoopToCurrent();
        }