docs: @Override
      public Record nextRecord() {
          List<Writable> next = next();
          URI uri = (locations == null || locations.length < 1 ? null : locations[splitIndex]);
          RecordMetaData meta = new RecordMetaDataLine(this.lineIndex - 1, uri, SVMLightRecordReader.class); //-1 as line number has been incremented already...
          return new org.datavec.api.records.impl.Record(next, meta);
      }