code: protected boolean parseEmptyOrCommentLine(final ParserData parserData, final String line) {
          if (isBlankLine(line)) {
              if (parserData.getCurrentLevel().getLevelType() == LevelType.BASE) {
                  parserData.getContentSpec().appendChild(new TextNode("\n"));
              } else {
                  parserData.getCurrentLevel().appendChild(new TextNode("\n"));
              }
              return true;
          } else {
              if (parserData.getCurrentLevel().getLevelType() == LevelType.BASE) {
                  parserData.getContentSpec().appendComment(line);
              } else {
                  parserData.getCurrentLevel().appendComment(line);
              }
              return true;
          }
      }
docs: Processes a line that represents a comment or an empty line in a Content Specification.
  
  @param parserData
  @param line       The line to be processed.
  @return True if the line was processed without errors, otherwise false.