code: private static String getResourceIconClasses(String resourceTypeName, String fileName, boolean small) {
  
          StringBuffer sb = new StringBuffer(CmsGwtConstants.TYPE_ICON_CLASS);
          sb.append(" ").append(getResourceTypeIconClass(resourceTypeName, small)).append(" ").append(
              getFileTypeIconClass(resourceTypeName, fileName, small));
          return sb.toString();
      }
docs: Returns the CSS classes of the resource icon for the given resource type and filename.<p>
  
  Use this the resource type and filename is known.<p>
  
  @param resourceTypeName the resource type name
  @param fileName the filename
  @param small if true, get the icon classes for the small icon, else for the biggest one available
  
  @return the CSS classes