id attribute is not required for include tag

plugins/android/src/org/jetbrains/android/dom/layout/Include.java

@@ -32,7 +32,7 @@ import org.jetbrains.android.dom.resources.ResourceValue;
  * To change this template use File | Settings | File Templates.
  */
 public interface Include extends LayoutElement {
-  @Required
+  /*@Required*/
   @ResourceType("id")
   @Convert(ResourceReferenceConverter.class)
   AndroidAttributeValue<ResourceValue> getId();

plugins/android/testData/dom/layout/layoutAttrs.xml

@@ -6,5 +6,6 @@
   />
 
   <requestFocus />
+  <include />
 
 </LinearLayout>