/wro4j-core/src/main/java/ro/isdc/wro/model/resource/processor/support/ImageUrlRewriter.java
if ( idxLastSeparator < 0) {   throw new IllegalStateException( ( ( "Invalid cssUri: " + cssUri) + ". Should contain at least one '/' character!") ) ; }
[Delete]
idxLastSeparator = cssUri.lastIndexOf(ClasspathUriLocator.PREFIX); if (idxLastSeparator >= 0) { idxLastSeparator += ClasspathUriLocator.PREFIX.length() - 1; } } if (idxLastSeparator < 0) { <extra_id_0> } } final String cssUriFolder = cssUri.substring(0, idxLastSeparator + 1); final String processedImageUrl = cleanImageUrl.startsWith(ServletContextUriLocator.PREFIX) ? cleanImageUrl.substring(1) : cleanImageUrl; final String computedImageLocation = cleanPath(cssUriFolder + processedImageUrl);