code: public java.util.List<CacheEngineVersion> getCacheEngineVersions() {
          if (cacheEngineVersions == null) {
              cacheEngineVersions = new com.amazonaws.internal.SdkInternalList<CacheEngineVersion>();
          }
          return cacheEngineVersions;
      }
docs: <p>
  A list of cache engine version details. Each element in the list contains detailed information about one cache
  engine version.
  </p>
  
  @return A list of cache engine version details. Each element in the list contains detailed information about one
  cache engine version.