code: @SuppressWarnings("unchecked")
  	public <T extends CacheManager> T customize(T cacheManager) {
  		LambdaSafe.callbacks(CacheManagerCustomizer.class, this.customizers, cacheManager)
  				.withLogger(CacheManagerCustomizers.class)
  				.invoke((customizer) -> customizer.customize(cacheManager));
  		return cacheManager;
  	}
docs: Customize the specified {@link CacheManager}. Locates all
  {@link CacheManagerCustomizer} beans able to handle the specified instance and
  invoke {@link CacheManagerCustomizer#customize(CacheManager)} on them.
  @param <T> the type of cache manager
  @param cacheManager the cache manager to customize
  @return the cache manager