yiigridview.getChecked should return array of checkbox's values instead of keys

It allow to change 'name' parameter of CCheckBoxColumn.

I use MANY-MANY (Child-ChildSchool-School) relation, so I select records from ChildSchool but display related Childs like this:

    'columns'      => array(
        array(
            'class' => 'CCheckBoxColumn',
            'id' => 'child-boxes',
            'name' => 'child.id',
            'selectableRows' => 2,
        ),
        array(
            'name' => 'child.lastname',
            'value' => 'CHtml::link(CHtml::encode($data->child->lastname),
                                     array("view","id" => $data->child->id))',
            'type' => 'raw',
            'filter' => CHtml::activeTextField($model, 'lastname'),
        ), 
        etc

In this case even if I use 'name' in CCheckBoxColumn yiigridview.getChecked returns keys of ChildSchool instead of 'child.id'.