Not typesafe ui:param

child.xhtml

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                xmlns:h="http://java.sun.com/jsf/html"
                xmlns:p="http://primefaces.org/ui">
    <ui:define name="columns">
        <!-- At this like, the IDE does not know the type of "key". So autocompletion and refactorings of "property" will fail. -->
        <h:outputText value="#{key.property}"/>
    </ui:define>
</ui:composition>

parent.xhtml

<ui:include src="test.xhtml">
	<ui:param name="key" value="#{value}"/>
</ui:include>