You're seeing just the function start_link, go back to Nostrum.Consumer module for more information.
Link to this function

start_link(mod, opts \\ [])

View Source


start_link(module(), options()) :: Supervisor.on_start()

Starts a consumer process.

mod is the name of the module where you define your event callbacks, which should probably be the current module which you can get with __MODULE__.

opts is a list of general process options. See Nostrum.Consumer.options/0 for more info.