Binance.cancel_order

You're seeing just the function cancel_order, go back to Binance module for more information.
Link to this function

cancel_order(symbol, timestamp, order_id \\ nil, orig_client_order_id \\ nil, new_client_order_id \\ nil, recv_window \\ nil)

Cancel an active order..

Symbol and either orderId or origClientOrderId must be sent.

Returns {:ok, %Binance.Order{}} or {:error, reason}.

Weight: 1

Info: https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md#cancel-order-trade