Flex Array of buttons in datagrid

Question

I have an ExtendedAdvancedDataGrid with a column which has toggle buttons in it (here is a snippet of the mxml code):

<columns:ExtendedAdvancedDataGridColumn id="toggle" sortable="false" editable="false" headerText="Sort" dataField="include_order" columnWidthMode="fixed" width="60">
    <columns:itemRenderer>
        <fx:Component>
            <mx:VBox verticalAlign="middle" horizontalAlign="center">
                <s:ToggleButton id="sortToggle" label="OFF" width="55" color="white" chromeColor="red"  selected="false" click="outerDocument.sortToggle_click(event)"/>
            </mx:VBox>
        </fx:Component>
    </columns:itemRenderer>
</columns:ExtendedAdvancedDataGridColumn>

When the user clicks one of the buttons, it calls function sortToggle_click(). I want that function to be able to access the label of the SECOND button in the list not matter which button was clicked. How do I access that particular button label in the function?

Thanks.