@Override
        public boolean canBeReplaced(String id) {
            // Is always false since this task is already handling both documents.
            return false;
        }
Merges two documents into one without moving neither or checking for
existance. This is done when both sources agree on the documents position.
tool-parent/tool-config/src/main/java/com/speedment/tool/config/util/DocumentMerger.java