update
abstract fun updateUserReactionForChannelItem(channel: Channel, item: IChannelItem, reactionType: ReactionType?, listener: RainbowListener<IChannelItem, Unit>?)
Updates the user reaction of a channel item
When this method is called with null as ReactionType, the reaction is removed.
Parameters
channel
Channel object that contains the IChannelItem
item
IChannelItem object to which the user adds a reaction
reaction
ReactionType enumeration that represents the user's reaction
listener
RainbowListener