code: async function _json(req, res) {
    const { queueName, queueHost, state } = req.params;
    const {Queues} = req.app.locals;
    const queue = await Queues.get(queueName, queueHost);
    if (!queue) return res.status(404).json({ message: 'Queue not found' });
  
    if (!isValidState(state, queue.IS_BEE)) return res.status(400).json({ message: `Invalid state requested: ${state}` });
  
    let jobs;
    if (queue.IS_BEE) {
      jobs = await queue.getJobs(state, { size: 1000 });
      jobs = jobs.map((j) => _.pick(j, 'id', 'progress', 'data', 'options', 'status'));
    } else {
      jobs = await queue[`get${_.capitalize(state)}`](0, 1000);
      jobs = jobs.map((j) => j.toJSON());
    }
  
    const filename = `${queueName}-${state}-dump.json`;
  
    res.setHeader('Content-disposition', `attachment; filename=${filename}`);
    res.setHeader('Content-type', 'application/json');
    res.write(JSON.stringify(jobs, null, 2), () => res.end());
  }
docs: Returns the queue jobs in the requested state as a json document.
  
  @prop {Object} req express request object
  @prop {Object} res express response object