if (causeIndex >= 0) {
                    return new NestedExceptionPlaceholder(NestedExceptionPlaceholder.Kind.cause, causeIndex);
                }
                int suppressedIndex = suppressed.indexOf(obj);
                if (suppressedIndex >= 0) {
                    return new NestedExceptionPlaceholder(NestedExceptionPlaceholder.Kind.suppressed, suppressedIndex);
                }
                return obj;