 ExpressionCacheWarmer   class ExpressionCacheWarmer implements CacheWarmerInterface  Methods      __construct(iterable $expressions, ExpressionLanguage $expressionLanguage)   
   bool   isOptional() Checks whether this warmer is optional or not.  
     warmUp(string $cacheDir) Warms up the cache.  
  Details                        
    __construct(iterable $expressions, ExpressionLanguage $expressionLanguage)
          Parameters   iterable $expressions    ExpressionLanguage $expressionLanguage                          bool
    isOptional()
          Checks whether this warmer is optional or not. Optional warmers can be ignored on certain conditions. A warmer should return true if the cache can be generated incrementally and on-demand. Return Value   bool true if the warmer is optional, false otherwise                         
    warmUp(string $cacheDir)
          Warms up the cache. Parameters   string $cacheDir The cache directory   

    
{'path': 'public/docs/symfony~4.1/symfony/bundle/securitybundle/cachewarmer/expressioncachewarmer.html', 'source': 'DevDocs.IO'}