code: public int getSize() {
          return 20 + (sacl == null ? 0 : sacl.getSize())
                  + (dacl == null ? 0 : dacl.getSize())
                  + (owner == null ? 0 : owner.getSize())
                  + (group == null ? 0 : group.getSize());
      }
docs: Gets size in terms of number of bytes.
  
  @return size.