Fix code coverage

Author: Jeremiah VALERIE

src/Config/TypeDefinition.php

@@ -215,15 +215,6 @@ protected function callbackSection(string $name, string $info): ArrayNodeDefinit
                 ->ifTrue(fn ($options) => is_string($options) && !ExpressionLanguage::stringHasTrigger($options))
                 ->then(fn ($options) => ['method' => $options])
             ->end()
-            ->beforeNormalization()
-                // clean expression
-                ->ifTrue(fn ($options) => isset($options['expression']) && is_string($options['expression']) && ExpressionLanguage::stringHasTrigger($options['expression']))
-                ->then(function ($options) {
-                    $options['expression'] = ExpressionLanguage::unprefixExpression($options['expression']);
-
-                    return $options;
-                })
-            ->end()
             ->children()
                 ->scalarNode('method')->end()
                 ->scalarNode('expression')->end()

src/Generator/TypeBuilder.php

@@ -887,11 +887,8 @@ private function buildCallback(Callback $callback, array $argNames, ?callable $e
             }
         } elseif (null !== $callback->id) {
             $fn = "$this->gqlServices->get('$callback->id')";
-            if ($callback->method) {
-                return Collection::numeric([$fn, $callback->method]);
-            } else {
-                return Literal::new($fn);
-            }
+
+            return Collection::numeric([$fn, $callback->method ?? '__invoke']);
         } else {
             return Literal::new("'$callback->method'");
         }