docs: function svgToPng(rootFolder, currentFile, $) {
      var currentDirectory = path.dirname(currentFile);
  
      return editHTMLElement($, 'img', function($img) {
          var src = $img.attr('src');
          if (path.extname(src) !== '.svg') {
              return;
          }
  
          // Calcul absolute path for this
          src = LocationUtils.toAbsolute(src, currentDirectory, '.');
  
          // We avoid generating twice the same PNG
          var hash = crc.crc32(src).toString(16);
          var fileName = hash + '.png';
  
          // Input file path
          var inputPath = path.join(rootFolder, src);
  
          // Result file path
          var filePath = path.join(rootFolder, fileName);
  
          return fs.assertFile(filePath, function() {
              return imagesUtil.convertSVGToPNG(inputPath, filePath);
          })
          .then(function() {
              // Convert filename to a relative filename
              fileName = LocationUtils.relative(currentDirectory, fileName);
  
              // Replace src
              $img.attr('src', fileName);
          });
      });
  }