code: public DescribeCacheParameterGroupsResult withCacheParameterGroups(CacheParameterGroup... cacheParameterGroups) {
          if (this.cacheParameterGroups == null) {
              setCacheParameterGroups(new com.amazonaws.internal.SdkInternalList<CacheParameterGroup>(cacheParameterGroups.length));
          }
          for (CacheParameterGroup ele : cacheParameterGroups) {
              this.cacheParameterGroups.add(ele);
          }
          return this;
      }
docs: <p>
  A list of cache parameter groups. Each element in the list contains detailed information about one cache
  parameter group.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setCacheParameterGroups(java.util.Collection)} or {@link #withCacheParameterGroups(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param cacheParameterGroups
  A list of cache parameter groups. Each element in the list contains detailed information about one cache
  parameter group.
  @return Returns a reference to this object so that method calls can be chained together.