private void copySet(LayoutFileSet set) {
        Copy task = new Copy();
        task.setTaskName("copy");
        task.setProject(getProject());
        String prefix = set.getPrefix(getProject());
        File target = prefix.length() > 0 ? new File(destDirectory, prefix + "/") : destDirectory;

        target.mkdirs();

        task.setTodir(target);
        LayoutFileSet unprefixed = (LayoutFileSet) set.clone();
        unprefixed.setPrefix("");

        task.addFileset(unprefixed);
        task.perform();
    }
private void copySet(LayoutFileSet set)