I am decorating a couple classes. These classes are ModelAdmin managed_models.
I would like to have model admin use some of my data additions for Search and Result columns.
How can I decorate the manager of my class?

OK, I have partially found my answer. That is that ModelAdmin is using the $summary_fields and $searchable_fields from my root class to determine this behaviour. SO how do I decorate these features?

ok, heres what I found works.
First we add to the database a language field, then we add it to the searchable_fields static array (this allows model admin to add it to the left side search options), the next function add the same item to the summary_fields static array so that it will be listed in the model admin results table.

    function extraStatics() {
        return array(
            'db' => array(
                'Language' => 'Enum("English,French","English")',
            ),
            'searchable_fields' => array(
                'Language',
            )
        );
    }

    function updateSummaryFields(Fieldset &$fields) {
       $fields['Language'] = 'Language'; 
    }

Don't for get to updateCMSFields if you want to have the db value editable in modeladmin.