private <T extends DEPArc>String toString(List<T> heads) { StringBuilder build = new StringBuilder(); Collections.sort(heads); for (DEPArc arc : heads) { build.append(DEPLib.DELIM_HEADS); build.append(arc.toString()); } if (build.length() > 0) return build.substring(DEPLib.DELIM_HEADS.length()); else return AbstractColumnReader.BLANK_COLUMN; }
continue; key = arc.toString();