Use pre/post-comment
diff --git a/examples/org.eclipse.ocl.examples.xtext.idioms/src/org/eclipse/ocl/examples/xtext/idioms/Idioms.idioms b/examples/org.eclipse.ocl.examples.xtext.idioms/src/org/eclipse/ocl/examples/xtext/idioms/Idioms.idioms
index 9c6d1bd..2cc38ed 100644
--- a/examples/org.eclipse.ocl.examples.xtext.idioms/src/org/eclipse/ocl/examples/xtext/idioms/Idioms.idioms
+++ b/examples/org.eclipse.ocl.examples.xtext.idioms/src/org/eclipse/ocl/examples/xtext/idioms/Idioms.idioms
@@ -11,10 +11,7 @@
 model Idioms
 import "platform:/resource/org.eclipse.ocl.examples.xtext.idioms/model/Idioms.ecore#/" as idioms
 
-segment PRE_COMMENT custom "org.eclipse.ocl.examples.xtext.idioms.serializer.XtextPreCommentSegmentSupport";
-segment POST_COMMENT custom "org.eclipse.ocl.examples.xtext.idioms.serializer.XtextPostCommentSegmentSupport";
-
-mixin idiom COMMENTS at final do PRE_COMMENT value POST_COMMENT;
+mixin idiom COMMENTS at final do pre-comment value post-comment;
 
 idiom BRACES {
 	at "{" do soft-space value push soft-new-line;