HtmlAttributeRewriter rw = new HtmlAttributeRewriter(
jobs.getPluginMeta(), new CssSchema(wl, wl),
htmlSchema, Maps.<Attr, EmbeddedContent>newHashMap(),
jobs.getMessageQueue());
HtmlAttributeRewriter.SanitizedAttr sanitized
= rw.sanitizeStringValue(HtmlAttributeRewriter.fromAttr(
classAttr, htmlSchema.lookupAttribute(BODY_CLASS),
source));
if (sanitized.isSafe) {
FilePosition pos = Nodes.getFilePositionForValue(classAttr);
Expression e = sanitized.result;