alloy - picker return value from child view

I pop a picker from a label onClick event. The picker view is set by a <Require> tag. I return the selected value from the picker onClose event, but where does it go? How do I get a handle on that value?

Parent View

<Alloy>
    <Window id="vendorCheckIn">
        <ScrollView id="checkInForm" class="formLayout">
            <TextArea id="checkInNote" />
            <View id="timePicker" layout="horizontal" top="50dp">               
                <Label id="timePickerLabel" text=" Set Location Hours" />               
            </View>
        </ScrollView>
    </Window>
</Alloy>

var helper = require('helpers');
 
helper.log(JSON.stringify(this));
$.timePickerLabel.addEventListener('click',function(e){
    return Alloy.createController('timePicker').getView().open();
 
});

<Alloy>
    <Window id="pickerWindow" class="container" backgroundColor="blue"  exitOnClose="true">
        <Picker id="picker" top="50" selectionIndicator="true" useSpinner="true">
            <PickerColumn id="hours">
                <PickerRow title="" />
                <PickerRow title="1"/>
                <PickerRow title="2"/>
                <PickerRow title="3"/>
                <PickerRow title="4"/>
            </PickerColumn>         
        </Picker>
        <Label id="pickerClose" text="Close" />
    </Window>
</Alloy>

var pickerVal;
 
$.picker.addEventListener('change',function(e){
    return pickerVal =  e.row.title;
 
});
 
$.pickerClose.addEventListener('click',function(e){
    alert('pickerVal = ' + pickerVal);
    $.pickerWindow.close();
    return pickerVal;
});