CacheWarmerInterface
            
            extends
                            WarmableInterface                    
                
            in
            
        
    
        
            Interface for classes able to warm up the cache.
Tags
Table of Contents
- isOptional() : bool
 - Checks whether this warmer is optional or not.
 - warmUp() : mixed
 - Warms up the cache.
 
Methods
isOptional()
Checks whether this warmer is optional or not.
    public
                    isOptional() : bool
        Optional warmers can be ignored on certain conditions.
A warmer should return true if the cache can be generated incrementally and on-demand.
Return values
bool —true if the warmer is optional, false otherwise
warmUp()
Warms up the cache.
    public
                    warmUp(string $cacheDir) : mixed
    
        Parameters
- $cacheDir : string
 - 
                    
The cache directory