code: function getCommentExpectedIndents (nextToken, nextExpectedIndent, lastExpectedIndent) {
      if (typeof lastExpectedIndent === 'number' && isClosingToken(nextToken)) {
        if (nextExpectedIndent === lastExpectedIndent) {
          // For solo comment. E.g.,
          // <div>
          //    <!-- comment -->
          // </div>
          return {
            primary: nextExpectedIndent + options.indentSize,
            secondary: undefined
          }
        }
  
        // For last comment. E.g.,
        // <div>
        //    <div></div>
        //    <!-- comment -->
        // </div>
        return { primary: lastExpectedIndent, secondary: nextExpectedIndent }
      }
  
      // Adjust to next normally. E.g.,
      // <div>
      //    <!-- comment -->
      //    <div></div>
      // </div>
      return { primary: nextExpectedIndent, secondary: undefined }
    }
docs: Get the expected indent of comments.
  @param {Token|null} nextToken The next token of comments.
  @param {number|undefined} nextExpectedIndent The expected indent of the next token.
  @param {number|undefined} lastExpectedIndent The expected indent of the last token.
  @returns {{primary:number|undefined,secondary:number|undefined}}