Oh, was I supposed to subclass and re-assign these statics?

That's a terrible idea. I think 'final' was just forgotten.

tools/src/main/java/com/threerings/presents/tools/ImportSet.java

@@ -444,9 +444,9 @@ public class ImportSet
     protected HashSet<String> _imports = Sets.newHashSet();
     protected List<String> _pushed = Lists.newArrayList();
 
-    protected static Pattern _splitter = Pattern.compile("\\*");
+    protected static final Pattern _splitter = Pattern.compile("\\*");
 
-    protected static List<String> IMPORT_GROUPS = Lists.newArrayList(
+    protected static final List<String> IMPORT_GROUPS = Lists.newArrayList(
         "flash",
         "fl",
         "java",