Let's say I have an entity Book:

/**
 * @ApiResource()
 */
class Book
{
    /**
     * @Groups({"read", "write"})
     */
    public $name;

    /**
     * @Groups("write")
     */
    public $author;

    /**
     * This property has no groups
     */
    public $foo;

    // ...
}

What I'm trying to achieve now is to serialize the $foo property, regardless of the current context groups. Is there some way to configure some kind of "default group" for properties where no group was given?

I know I could just add the group to my property, but I was hoping to configure something (or decorate something) so the serializer will return the property $foo.

TLDR: How can I define a default group for all properties? Is this already possible or might be a new feature?