parseJSONL (body, setCb, endCb) {
    const json = body.toString().split('\n').reduce((acc, line) => {
      try {
        if (line.trim() !== '') {
          acc.push(JSON.parse(line));
        }
      } catch (e) {
        console.log(this.section, `Skipping bad JSON line: ${line}`);
      }
      return acc;
    }, []);
    return this.parseJSONArray(json, setCb, endCb);
  }
Util function to parse JSONL formatted data
@param {string} body - the raw JSONL data
@param {function} setCb - the function to call for each row found
@param {function} endCB - all done parsing