parameters:
    param_fetcher_listener.class: M6Web\Bundle\FOSRestExtraBundle\EventListener\ParamFetcherListener

services:
    m6_web_fos_rest_extra.listener.param_fetcher.listener:
        class: "%param_fetcher_listener.class%"
        arguments: [@annotation_reader, @fos_rest.request.param_fetcher]
        scope: request
        tags:
            - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }

parameters:
    param_fetcher_listener.class: M6Web\Bundle\FOSRestExtraBundle\EventListener\ParamFetcherListener

services:
    m6_web_fos_rest_extra.listener.param_fetcher.listener:
        class: "%param_fetcher_listener.class%"
        arguments: ["@annotation_reader", "@fos_rest.request.param_fetcher"]
        scope: request
        tags:
            - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }

Add support from symfony 3
Add support from symfony 3

The reserved indicator "@" cannot start a plain scalar. Need Quote.