message: Removed cosign transaction `isAnnounced`
diff: @@ -41,9 +41,6 @@ export class CosignatureTransaction {
  * @returns {CosignatureTransaction}
  */
  public static create(transactionToCosign: AggregateTransaction): CosignatureTransaction {
  - if (transactionToCosign.isUnannounced()) {
  - throw new Error('Transaction to cosign should be announced first');
  - }
  return new CosignatureTransaction(transactionToCosign);
  }
  