Documentation error: Access level to [Controller]::filterableBy() must be public (as in class Orion\Http\Controllers\BaseController)

[PatFox]

Hi,

A small issue, this one -- the documentation gives the following example code for Controller::filterableBy()

protected function filterableBy() : array
    {
        return ['id', 'title', 'user.id', 'meta.source_id', 'created_at'];
    }

...which results in an error -- Access level to [Controller]::filterableBy() must be public (as in class Orion\Http\Controllers\BaseController)

The same goes for e.g. exposedScopes(), searchableBy() etc. So the examples should be updated to have these methods set as public.