How to access Map key in jsf datatable
===

I'm getting the error `javax.el.PropertyNotFoundException: /member/apps/cms/edit.xhtml @228,49 value="#{props.key}": Property 'key' not found on type java.util.HashMap$Values` when trying to display the datatable below.

<p:dataTable id="properties" var="props" value="#{contentEditorBacking.properties}" editable="true">
								
	<p:column headerText="Property">
		<p:cellEditor>
			<f:facet name="output">	
				<h:outputText value="#{props.key}" />
			</f:facet>
			<f:facet name="input">
				<h:inputText value="#{props.key}" />
			</f:facet>
		</p:cellEditor>
	</p:column>
	<p:column headerText="Value">
		<p:cellEditor>
                        <f:facet name="output">	
				<h:outputText value="#{props.value}" />
			</f:facet>
			<f:facet name="input">
				<h:inputText value="#{props.value}" />
			</f:facet>
		</p:cellEditor>
	</p:column>
								
	<p:column headerText="Edit">
		<p:rowEditor />
		<!-- Need to put an update on here yet -->
		<p:commandLink styleClass="ui-icon ui-icon-trash" id="deleteProperty" actionListener="#{contentEditorBacking.deleteProperty}">
		         <f:attribute name="key" value="#{props.key}" />
	         </p:commandLink>
	</p:column>
</p:dataTable>

Here's the relevant part of my contentEditorBacking:

    @ManagedBean
    @ViewScoped
    public class ContentEditorBacking {
    	private Map<String, Properties> properties = new LinkedHashMap<String, Properties>();
    
        public Collection<Properties> getProperties() throws Exception{
    		return properties.values();
    	}
    
        public static class Properties{
    		
    		private String key;
    		private String value;
    		
    		public Properties(String key, String value) {
    			super();
    			this.key = key;
    			this.value = value;
    		}
    		
    		public String getKey() {
    			return key;
    		}
    		public void setKey(String key) {
    			this.key = key;
    		}
    		public String getValue() {
    			return value;
    		}
    		public void setValue(String value) {
    			this.value = value;
    		}
    		@Override
    		public String toString() {
    			return "key=" + key + ", value=" + value + "";
    		}
    		
    	}
    }

How can i access the key value from my properties map?