code: protected String formatPosTag(String posTag, int position, int multiwordLength) {
      return tagFormat != null ? String.format(tagFormat, posTag) : posTag;
    }
docs: Override this method if you want format POS tag differently
  @param posTag POS tag for the multiword
  @param position Position of the token in the multiword
  @return Returns formatted POS tag for the multiword