async createTestSheetsChart(
      presentationId,
      pageId,
      spreadsheetId,
      sheetChartId,
  ) {
    const chartId = 'MyChart_01';
    const emu4M = {
      magnitude: 4000000,
      unit: 'EMU',
    };
    const requests = [
      {
        createSheetsChart: {
          objectId: chartId,
          spreadsheetId: spreadsheetId,
          chartId: sheetChartId,
          linkingMode: 'LINKED',
          elementProperties: {
            pageObjectId: pageId,
            size: {
              height: emu4M,
              width: emu4M,
            },
            transform: {
              scaleX: 1,
              scaleY: 1,
              translateX: 100000,
              translateY: 100000,
              unit: 'EMU',
            },
          },
        },
      },
    ];

    const res = await this.slidesService.presentations.batchUpdate({
      presentationId,
      resource: {
        requests,
      },
    });
    return res.data.replies[0].createSheetsChart.objectId;
  }
Creates a test spreadsheet chart
@param  {string}   presentationId The presentation ID
@param  {string}   pageId         The element page object ID
@param  {string}   spreadsheetId  The Sheet's ID
@param  {string}   sheetChartId   The Sheet's Chart ID
@return {Promise<string>} The chart's object ID