Telegex.answer_shipping_query

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

answer_shipping_query(shipping_query_id, ok, optionals \\ [])

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Specs

answer_shipping_query(String.t(), boolean(),
  shipping_options: [Telegex.Model.ShippingOption.t()],
  error_message: String.t()
) :: {:ok, boolean()} | {:error, Telegex.Model.errors()}

f you sent an invoice requesting a shipping address and the parameter is_flexible was specified, the Bot API will send an Telegex.Model.Update with a shipping_query field to the bot. Use this method to reply to shipping queries. On success, True is returned.