Index: src/main/java/org/openstreetmap/josm/plugins/pt_assistant/utils/StopUtils.java
===================================================================
--- src/main/java/org/openstreetmap/josm/plugins/pt_assistant/utils/StopUtils.java	(revision 704)
+++ src/main/java/org/openstreetmap/josm/plugins/pt_assistant/utils/StopUtils.java	(working copy)
@@ -4,6 +4,7 @@
 import org.openstreetmap.josm.data.osm.Node;
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
 import org.openstreetmap.josm.data.osm.Relation;
+import org.openstreetmap.josm.tools.Utils;
 
 /**
  * Utils class for stop areas
@@ -69,7 +70,7 @@
      * @return true if the object part of stop area relation, false otherwise.
      */
     public static boolean verifyIfMemberOfStopArea(final OsmPrimitive member) {
-        for (Relation parentRelation : OsmPrimitive.getFilteredList(member.getReferrers(), Relation.class)) {
+        for (Relation parentRelation : Utils.filteredCollection(member.getReferrers(), Relation.class)) {
             if (StopUtils.isStopArea(parentRelation)) {
                 return true;
             }