          <p:selectOneListbox id="lstItems" value="#{relationshipController.current}" >
                                                        <f:selectItems value="#{relationshipController.items}" var="r" itemLabel="#{r.atobName} - #{r.btoaName} " itemValue="#{r}" ></f:selectItems>
                                                        <f:ajax event="change" execute="lstItems" render="panelDetails" ></f:ajax>
                                                    </p:selectOneListbox>
                      