jms_serializer:
    handlers:
        # to be removed if we switch to (default) ISO8601 datetime instead of ATOM
        # see: https://github.com/schmittjoh/JMSSerializerBundle/pull/494
        datetime:
            default_format: "Y-m-d\\TH:i:sO" # ATOMjms_serializer:
    visitors:
        xml_serialization:
            format_output: '%kernel.debug%'