net.minecraft.network.protocol.configuration

Class
ClientboundFinishConfigurationPacket
ClientboundRegistryDataPacket
ClientboundResetChatPacket
ClientboundSelectKnownPacks
ClientboundUpdateEnabledFeaturesPacket
ConfigurationPacketTypes
ConfigurationProtocols
ServerboundFinishConfigurationPacket
ServerboundSelectKnownPacks

Interface
ClientConfigurationPacketListener
ServerConfigurationPacketListener