<p:columnGroup Com <p:columns>

Front-end
#1

tenho colunas dinamicas e elas nao aparecem no agrupamento… alguém já tentou algo do tipo??

<p:columnGroup type="header" >  
                                <p:row>  
                                    <p:column colspan="6" headerText="First Day Of the Week:" />
                                   
                                    <c:if test="#{quarterCommitMB.quarterWeek == 30}">
                                        <p:columns value="#{quarterCommitMB.columns}" var="column" columnIndexVar="colIndex">
                                             <p:column headerText="#{quarterCommitMB.dias.get(colIndex).data}"/>
                                        </p:columns>
                                    </c:if>
                                </p:row>
#2

Alguemm???

#3

pesquisando achei um post gringo falando isso “The table is backed by a @ViewScoped Managed Bean. It works fine, but:
Just like a pivot-table, I need to display multiple headers too, in order to group some fields together. Unfortunately, <p:columns> is not compatible with <p:columnGroup>”

alguem ja tentou fazer algo do tipo??

#4