function getLinesWhenCollapsed(details) {
  const SURROUNDING_LINES_TO_SHOW_WHEN_COLLAPSED = 2;
  return Util.filterRelevantLines(
    details.lines,
    details.lineMessages,
    SURROUNDING_LINES_TO_SHOW_WHEN_COLLAPSED
  );
}
@param {LH.Audit.Details.SnippetValue} details
@return {LH.Audit.Details.SnippetValue['lines']}