src/main/comments.js/findExpressionIndexForComment
function findExpressionIndexForComment(quasis, comment, options) {
  const startPos = options.locStart(comment) - 1;

  for (let i = 1; i < quasis.length; ++i) {
    if (startPos < options.locStart(quasis[i])) {
      return i - 1;
    }
  }

  // We haven't found it, it probably means that some of the locations are off.
  // Let's just return the first one.
  /* istanbul ignore next */
  return 0;
}