2022
JPoint - Koshelev - By Kafka 3 - Apache Kafka and Consumers of 53:43
    https://www.youtube.com/watch?v=NXU_F_7STSM
    https://squidex.jugru.team/api/assets/srm/9830ff16-aa51-46e7-b08f-62dc3e5e4996/grigorii-koshelev.pdf
    ! 16:08 Under the hood of consumer are:
    !   KafkaConsumer
    !   ConsumerMetadata
    !   SubscriptionState // subscriptions
    !   ConsumerNetworkClient
    !   NetworkClient
    !   Fetcher
    !   ConsumerCoordinator   // if consumer groups are used
    !     assign (we specify concrete partitions)
    !     subscribe - auto ...
    !   !!! subscribe - can subscribe for multiple topics, named accroding to some regex-pattern
2020
Koshelev - Speeding Up Producers 0:00 of 1:11:53
    https://www.youtube.com/watch?v=zMLfxztAVlo
2019
Koshelev - By Kafka
    https://www.youtube.com/watch?v=A_yUaPARv8U
    https://assets.ctfassets.net/oxjq45e8ilak/5C3BJ4jXm0xaI5Cz8ZN2ra/e3cceba5659722f6d94859f0e96356dc/Grigoriy_Koshelev_Kogda_vs_poshlo_po_Kafke.pdf