How to use the @ohif/core.log.warn function in @ohif/core

oReq.addEventListener('load', () => {
        // Parse the response content
        // https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseText
        if (!oReq.responseText) {
          log.warn('Response was undefined');
          reject(new Error('Response was undefined'));
        }

        log.info(JSON.stringify(oReq.responseText, null, 2));

        const data = JSON.parse(oReq.responseText);
        if (data.servers && query.studyInstanceUids) {
          const server = data.servers.dicomWeb[0];
          server.type = 'dicomWeb';

          const studyInstanceUids = query.studyInstanceUids.split(';');
          const seriesInstanceUids = [];

          retrieveStudiesMetadata(
            server,
            studyInstanceUids,

if (isToolSupported(toolType)) {
        const imageId = getImageIdForImagePath(imagePath);
        toolState[imageId] = toolState[imageId] || {};
        toolState[imageId][toolType] = toolState[imageId][toolType] || {
          data: [],
        };

        toolState[imageId][toolType].data.push(annotation);
      } else {
        unsupportedTools.push(toolType);
      }
    });
  });

  if (unsupportedTools.length > 0) {
    log.warn(
      `[DICOMSR] Tooltypes not supported: ${unsupportedTools.join(', ')}`
    );
  }

  const report = MeasurementReport.generateReport(
    toolState,
    cornerstone.metaData
  );

  return {
    dataset: report.dataset,
  };
};

oReq.addEventListener('error', error => {
        log.warn('An error occurred while retrieving the JSON data');
        reject(error);
      });