Problem when using data-simpleevent in select with data-simplerepeat

thanks a lot for your fancy lib
ex:
'<select data-simplerepeat="branch:branches"
                    data-simpleevent="change:setCurrentBranch:branch"
                    class="form-control ">
                <option data-simplebindattrs='value:branch.Id' data-simplebind="branch.Name"></option>

            </select>'

in setCurrentBranch event branch is undefined 