(indexedEvent: Ordered[IndexedEvent]).<(that)
(indexedEvent: Ordered[IndexedEvent]).<=(that)
(indexedEvent: Ordered[IndexedEvent]).>(that)
(indexedEvent: Ordered[IndexedEvent]).>=(that)
(indexedEvent: Ordered[IndexedEvent]).compare(that)
(indexedEvent: Ordered[IndexedEvent]).compareTo(that)