Alchemy.Client.edit_message

You're seeing just the function edit_message, go back to Alchemy.Client module for more information.
Link to this function

edit_message(message, content, opts \\ [])

Edits a message's contents.

Examples

{:ok, message} = Client.send_message(channel, "ping!")
Process.sleep(1000)
Client.edit_message(message, "not ping anymore!")