Function normalizeTooltipFormatResult

_benchmarks/sample_echarts.js:20536–20566

* For backward compat, normalize the return from `formatTooltip`.

(result // markersExisting: Dictionary<ColorString>
    )

     */

    function normalizeTooltipFormatResult(result // markersExisting: Dictionary<ColorString>
    ) {
      var markupText; // let markers: Dictionary<ColorString>;

      var markupFragment;

      if (isObject(result)) {
        if (result.type) {
          markupFragment = result;
        } else {
          if ("development" !== 'production') {
            console.warn('The return type of `formatTooltip` is not supported: ' + makePrintable(result));
          }
        } // else {
        //     markupText = (result as TooltipFormatResultLegacyObject).html;
        //     markers = (result as TooltipFormatResultLegacyObject).markers;
        //     if (markersExisting) {
        //         markers = zrUtil.merge(markersExisting, markers);
        //     }
        // }

      } else {
        markupText = result;
      }

      return {
        markupText: markupText,
        // markers: markers || markersExisting,
        markupFragment: markupFragment
      };
    }

    /**
     * @param {Object} define