$queryType = new \GraphQL\Type\Definition\ObjectType([
'name' => 'Query',
'fields' => [
'echo' => [
'type' => \GraphQL\Type\Definition\Type::string(),
'args' => [
'message' => ['type' => \GraphQL\Type\Definition\Type::string()],
],
'resolve' => function ($root, $args) {
return $root['prefix'].$args['message'];
}
],
],
]);