I may be using this wrong, but I believe it's the same as in the examples:
(with-open [c (consumer/make-consumer cc key-deserializer value-deserializer options)]
(franzy.clients.consumer.protocols/seek-to-end-offset! c [{:topic "trance" :partition 0}]))
Causes:
ClassCastException [Lorg.apache.kafka.common.TopicPartition; cannot be cast to java.util.Collection franzy.clients.consumer.client.FranzConsumer (client.clj:114)