getCause(Throwable): Refactored into two methods which are called internally. This will allow more cause method names to be added with ease. getCauseUsingWellKnownTypes(Throwable): Extracted from getCause(). getCauseUsingMethodName(String, Throwable): Extracted from getCause().
jakarta/commons/proper/lang/trunk/src/java/org/apache/commons/lang/exception/ExceptionUtils.java