code: public DescribeDBClustersResult withDBClusters(DBCluster... dBClusters) {
          if (this.dBClusters == null) {
              setDBClusters(new java.util.ArrayList<DBCluster>(dBClusters.length));
          }
          for (DBCluster ele : dBClusters) {
              this.dBClusters.add(ele);
          }
          return this;
      }
docs: <p>
  Contains a list of DB clusters for the user.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDBClusters(java.util.Collection)} or {@link #withDBClusters(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param dBClusters
  Contains a list of DB clusters for the user.
  @return Returns a reference to this object so that method calls can be chained together.