Added the getThrowableCount(Throwable), getThrowables(Throwable), indexOfThrowable(Throwable, Class), and indexOfThrowable(Throwable, Class, int) methods factored out of NestableDelegate, as suggested by Stephen Colebourne <scolebourne@btopenworld.com>. Added a TODO for the remaining methods he suggested moving.
jakarta/commons/proper/lang/trunk/src/java/org/apache/commons/lang/exception/ExceptionUtils.java