The method getPackagePath exists in two classes, one is in DefaultVFS.java, the other one is in ResolverUtil.java. And they are identical. Delete that in DefaultVFS.java.
Comment From: harawata
The method is not used indeed. Thank you, @ISHIDAUNAI !
Comment From: harawata
I'm sorry, but I reverted the change because this method could be used by a subclass of DefaultVFS.