function loadSourceMapFixture(name) {
  const dir = `${LH_ROOT}/core/test/fixtures/source-maps`;
  const mapJson = fs.readFileSync(`${dir}/${name}.js.map`, 'utf-8');
  const content = fs.readFileSync(`${dir}/${name}.js`, 'utf-8');
  return {
    map: JSON.parse(mapJson),
    content,
  };
}
@param {string} name
@return {{map: LH.Artifacts.RawSourceMap, content: string}}