<composite:interface componentType="nestedGridCellEditor">
<composite:attribute name="componentName" required="false" shortDescription="Name of the attribute to display in the id"/>
<composite:attribute name="action" required="false" targets="#{cc.attrs.componentName}button" shortDescription="A method expression or a string outcome to process when command is executed"/>
</composite:interface>


<composite:implementation>
        <p:commandButton id="#{cc.attrs.componentName}button"/>
</composite:implementation>

<sm:nestedGridCellEditor id="DateNGCE" componentName="Foo2101"
      action="#{contractTermsBudgetController.updateRow('Date', budget)}"/>