code: public DescribeClustersRequest withClusterNames(String... clusterNames) {
          if (this.clusterNames == null) {
              setClusterNames(new java.util.ArrayList<String>(clusterNames.length));
          }
          for (String ele : clusterNames) {
              this.clusterNames.add(ele);
          }
          return this;
      }
docs: <p>
  The names of the DAX clusters being described.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setClusterNames(java.util.Collection)} or {@link #withClusterNames(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param clusterNames
  The names of the DAX clusters being described.
  @return Returns a reference to this object so that method calls can be chained together.