code: public DescribeClusterDbRevisionsResult withClusterDbRevisions(ClusterDbRevision... clusterDbRevisions) {
          if (this.clusterDbRevisions == null) {
              setClusterDbRevisions(new com.amazonaws.internal.SdkInternalList<ClusterDbRevision>(clusterDbRevisions.length));
          }
          for (ClusterDbRevision ele : clusterDbRevisions) {
              this.clusterDbRevisions.add(ele);
          }
          return this;
      }
docs: <p>
  A list of revisions.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setClusterDbRevisions(java.util.Collection)} or {@link #withClusterDbRevisions(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param clusterDbRevisions
  A list of revisions.
  @return Returns a reference to this object so that method calls can be chained together.