code: protected void prependBase64EncodedResources(StringBuffer sb, Map<String, Base64EncodedResource> encodedImages) {
  		Iterator<Entry<String, Base64EncodedResource>> it = encodedImages.entrySet().iterator();
  		StringBuilder mhtml = new StringBuilder();
  		String lineSeparator = StringUtils.STR_LINE_FEED;
  		mhtml.append("/*!").append(lineSeparator);
  		mhtml.append("Content-Type: multipart/related; boundary=\"" + BOUNDARY_SEPARATOR + "\"").append(lineSeparator)
  				.append(lineSeparator);
  
  		while (it.hasNext()) {
  			Entry<String, Base64EncodedResource> pair = it.next();
  			Base64EncodedResource encodedResource = (Base64EncodedResource) pair.getValue();
  			mhtml.append(BOUNDARY_SEPARATOR_PREFIX + BOUNDARY_SEPARATOR).append(lineSeparator);
  			mhtml.append("Content-Type:").append(encodedResource.getType()).append(lineSeparator);
  			mhtml.append("Content-Location:").append(encodedResource.getId()).append(lineSeparator);
  			mhtml.append("Content-Transfer-Encoding:base64").append(lineSeparator).append(lineSeparator);
  			mhtml.append(encodedResource.getBase64Encoding()).append(lineSeparator).append(lineSeparator);
  		}
  
  		mhtml.append(BOUNDARY_SEPARATOR_PREFIX + BOUNDARY_SEPARATOR + BOUNDARY_SEPARATOR_PREFIX).append(lineSeparator);
  		mhtml.append("*/").append(lineSeparator).append(lineSeparator);
  		sb.insert(0, mhtml.toString());
  	}
docs: Prepend the base64 encoded resources to the bundle data
  
  @param sb
  the string buffer containing the processed bundle data
  @param encodedImages
  a map of encoded images