t :: %Easypost.CustomsInfo{id: String.t, object: String.t, contents_explanation: String.t, contents_type: String.t, customs_certify: boolean, customs_signer: String.t, eel_pfc: String.t, non_delivery_option: String.t, restriction_comments: String.t, restriction_type: String.t, customs_items: [Easypost.CustomsItem], created_at: String.t, updated_at: String.t}