static function cache_sugar_vcal_freebusy(&$user_focus)
{
$focus = new vCal();
// set freebusy members and save
$arr = array('user_id'=>$user_focus->id,'type'=>'vfb','source'=>'sugar');
$focus->retrieve_by_string_fields($arr);
$focus->content = $focus->get_vcal_freebusy($user_focus,false);
$focus->type = 'vfb';
$focus->date_modified = null;
$focus->source = 'sugar';
$focus->user_id = $user_focus->id;
$focus->save();
}