baseNode = fsfsOwner.getRevisionNode(baseNode.getId());
baseNode = fsfsOwner.getRevisionNode(baseNode.getPredecessorId());
    public FSRepresentation chooseDeltaBase(FSFS fsfsOwner) throws SVNException {        if(getCount() == 0){            return null;        }        long count = getCount();        count = count & (count - 1);        FSRevisionNode baseNode = this;        while((count++) < getCount()){            baseNode = fsfsOwner.getRevisionNode(baseNode.getId());        }        return baseNode.getTextRepresentation();     }