Nostrum.Api.start_typing-exclamation-mark

You're seeing just the function start_typing-exclamation-mark, go back to Nostrum.Api module for more information.
Link to this function

start_typing!(channel_id)

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Specs

start_typing!(integer()) :: no_return() | {:ok}

Same as start_typing/1, but raises Nostrum.Error.ApiError in case of failure.