@type operation() ::
  Stellar.TxBuild.AccountMerge.t()
  | Stellar.TxBuild.BumpSequence.t()
  | Stellar.TxBuild.BeginSponsoringFutureReserves.t()
  | Stellar.TxBuild.ChangeTrust.t()
  | Stellar.TxBuild.ClaimClaimableBalance.t()
  | Stellar.TxBuild.Clawback.t()
  | Stellar.TxBuild.ClawbackClaimableBalance.t()
  | Stellar.TxBuild.CreateAccount.t()
  | Stellar.TxBuild.CreateClaimableBalance.t()
  | Stellar.TxBuild.CreatePassiveSellOffer.t()
  | Stellar.TxBuild.EndSponsoringFutureReserves.t()
  | Stellar.TxBuild.LiquidityPoolDeposit.t()
  | Stellar.TxBuild.LiquidityPoolWithdraw.t()
  | Stellar.TxBuild.ManageData.t()
  | Stellar.TxBuild.ManageSellOffer.t()
  | Stellar.TxBuild.ManageBuyOffer.t()
  | Stellar.TxBuild.Payment.t()
  | Stellar.TxBuild.PathPaymentStrictSend.t()
  | Stellar.TxBuild.PathPaymentStrictReceive.t()
  | Stellar.TxBuild.RevokeSponsorship.t()
  | Stellar.TxBuild.SetOptions.t()
  | Stellar.TxBuild.SetTrustlineFlags.t()
  | Stellar.TxBuild.InvokeHostFunction.t()
  | Stellar.TxBuild.ExtendFootprintTTL.t()
  | Stellar.TxBuild.RestoreFootprint.t()

@type t() :: %Stellar.TxBuild.Operation{
  body: operation(),
  source_account: Stellar.TxBuild.OptionalAccount.t()
}