problem exrpoting p:TreeTable with inside p:columns

[besaurus]

Hello ,

i'm succesfully using lapis.jsfexporter, im'using primefaces 6.2 with sping boot.
I have a problem whitih one pages, beside a snipped of code

<p:treeTable id="i" widgetVar="i" value="#{iHV.selectDates)}" 
	var="node" 
	rendered="#{iHV.selectIndicator != null}" 
	paginator="false"
	resizableColumns="true"
	paginatorPosition="top" >
	<f:facet name="header">
		<p:commandLink ajax="false">  
			<p:graphicImage value="/images/excel.png" height="20"/>
			<l:dataExporter source="i" fileType="excel" fileName="documents"/>
		</p:commandLink>
	</f:facet>	  
	<p:column headerText="Description" style="width:300px">
		<h:outputText value="#{node[1]}" title="#{node[1]}"/>
	</p:column>  
	<p:columns value="#{iHV.inValDates}" var="c" columnIndexVar="colIndex">
		<f:facet name="header">
			<h:outputText value="#{c}" />
		</f:facet>
		<h:outputText value="#{iHV.getValue(node[0],c)}">
			<f:convertNumber pattern="#,###,##0.0000" />
		</h:outputText>
	</p:columns>
</p:treeTable>

The problem is jsfexportewr do not manage p:columns but only p:column!!!!

May you extends implementation?.

Thanks in advance