code: public void setIndexNames(java.util.Collection<String> indexNames) {
          if (indexNames == null) {
              this.indexNames = null;
              return;
          }
  
          this.indexNames = new java.util.ArrayList<String>(indexNames);
      }
docs: <p>
  The index names.
  </p>
  
  @param indexNames
  The index names.