Alchemy.Events.on_channel_update

You're seeing just the macro on_channel_update, go back to Alchemy.Events module for more information.
Link to this macro

on_channel_update(func)

(macro)

Registers a handle triggering whenever a guild channel gets updated.

args : Alchemy.Channel.t

Examples

Events.on_channel_update(:foo)
def foo(channel) do
  IO.inspect "#{channel.name} was updated"
end