GenServer.cast

You're seeing just the function cast, go back to GenServer module for more information.

Specs

cast(server(), term()) :: :ok

Sends an asynchronous request to the server.

This function always returns :ok regardless of whether the destination server (or node) exists. Therefore it is unknown whether the destination server successfully handled the message.

server can be any of the values described in the "Name registration" section of the documentation for this module.