--- /dev/null
+<?php
+
+namespace Drupal\drupalmoduleupgrader\Plugin\DMU\Converter\Functions;
+
+use Drupal\drupalmoduleupgrader\TargetInterface;
+use Pharborist\Functions\FunctionCallNode;
+use Pharborist\Objects\ClassMethodCallNode;
+
+/**
+ * @Converter(
+ * id = "variable_del",
+ * description = @Translation("Replaces variable_del() calls with Configuration API.")
+ * )
+ */
+class VariableDel extends VariableAPI {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function rewrite(FunctionCallNode $call, TargetInterface $target) {
+ if ($this->tryRewrite($call, $target)) {
+ return ClassMethodCallNode::create('\Drupal', 'config')
+ ->appendArgument($target->id() . '.settings')
+ ->appendMethodCall('clear')
+ ->appendArgument(clone $call->getArguments()->get(0))
+ ->appendMethodCall('save');
+ }
+ }
+
+}