
                    <f:facet name="header">
                        <rich:columnGroup>
                            <rich:column styleClass="properties-table-header-cell">
                                <h:outputText
                                        value="#{messages['control.resourceInstance.previous.executedAt']}"/>
                            </rich:column>
                            <rich:column styleClass="properties-table-header-cell">
                                <h:outputText
           