Shippex.Carrier.cancel_transaction

You're seeing just the callback cancel_transaction, go back to Shippex.Carrier module for more information.
Link to this callback

cancel_transaction(arg1)

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Specs

cancel_transaction(Shippex.Transaction.t()) :: {atom(), String.t()}
Link to this callback

cancel_transaction(arg1, arg2)

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Specs

cancel_transaction(Shippex.Shipment.t(), String.t()) :: {atom(), String.t()}