Function querySeriesUpstreamDatasetModel

_benchmarks/sample_echarts.js:17653–17667

* @return If return null/undefined, indicate that should not use datasetModel.

(seriesModel)

     */

    function querySeriesUpstreamDatasetModel(seriesModel) {
      // Caution: consider the scenario:
      // A dataset is declared and a series is not expected to use the dataset,
      // and at the beginning `setOption({series: { noData })` (just prepare other
      // option but no data), then `setOption({series: {data: [...]}); In this case,
      // the user should set an empty array to avoid that dataset is used by default.
      var thisData = seriesModel.get('data', true);

      if (!thisData) {
        return queryReferringComponents(seriesModel.ecModel, 'dataset', {
          index: seriesModel.get('datasetIndex', true),
          id: seriesModel.get('datasetId', true)
        }, SINGLE_REFERRING).models[0];
      }
    }
    /**
     * @return Always return an array event empty.
     */