Updating composite overlayPanel

Question

Based on this subject, I would like to update a <p:overlayPanel> from a datatable to a composite component

View

<h:form id="myForm">
    <p:dataTable id="myTable" ...>
        <p:column headerText="1">
            <p:commandLink id="link" 
                           actionListener="#{bean.update}" 
                           update=":toto" value="Val" />
            <p:overlayPanel id="panel" for="link">
                <my:view id="toto">
            </p:overlayPanel>
         </p:column>
     </p:dataTable>
</h:form>

Composite

<composite:implementation>
    <span id="#{cc.clientId}">
        <p:dataTable id="toto" ...>
        </p:dataTable>
    </span>
</composite:implementation>

However I always get an error message saying that :toto component id can not be reached.

So, how can I access the dataTable placed in the composite ?

EDIT : Actually I changed my mind concerning the utilisation of p:overlayPanel for a p:datatable because of the creation of dynamic ids. I replaced this by a p:dialog and it works great.