docs: public DBCluster withReadReplicaIdentifiers(String... readReplicaIdentifiers) {
          if (this.readReplicaIdentifiers == null) {
              setReadReplicaIdentifiers(new com.amazonaws.internal.SdkInternalList<String>(readReplicaIdentifiers.length));
          }
          for (String ele : readReplicaIdentifiers) {
              this.readReplicaIdentifiers.add(ele);
          }
          return this;
      }