code: public ReplicationGroup withMemberClusters(String... memberClusters) {
          if (this.memberClusters == null) {
              setMemberClusters(new com.amazonaws.internal.SdkInternalList<String>(memberClusters.length));
          }
          for (String ele : memberClusters) {
              this.memberClusters.add(ele);
          }
          return this;
      }
docs: <p>
  The names of all the cache clusters that are part of this replication group.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setMemberClusters(java.util.Collection)} or {@link #withMemberClusters(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param memberClusters
  The names of all the cache clusters that are part of this replication group.
  @return Returns a reference to this object so that method calls can be chained together.