'Move the created/updated/creator fields to a fieldset of its own,
at the end, and collapsed.'

def get_fieldsets(self, request, obj=None):

    fieldsets = super().get_fieldsets(request, obj)
    for (name, fieldset) in fieldsets:
        for f in ('created', 'updated', 'creator', 'last_modified_by'):
            if (f in fieldset['fields']):
                fieldset['fields'].remove(f)
    return (fieldsets + [('CMS    metadata', {'fields': [('creator', 'created'), ('last_modified_by', 'updated')], 'classes': ('collapse',)})])
