@Override
  public String toString() {
    return "Account[" + getId() + "," + getSnapshotVersion() + "]";
  }
Generates a String representation that uniquely identifies this account. The string is in the format of
{@code Account[id]}.
@return The String representation of this account.
ambry-api/src/main/java/com/github/ambry/account/Account.java