src/Service.php
public function getCallbackResolver()
    {
        if (! $this->callbackResolver instanceof CallbackResolverInterface) {
            $this->callbackResolver = new CallbackResolver($this);
        }

        return $this->callbackResolver;
    }
public function getCallbackResolver()
    {
        if (! $this->callbackResolver instanceof CallbackResolverInterface) {
            $this->callbackResolver = new CallbackResolver($this);
        }

        return $this->callbackResolver;
    }
public function getCallbackResolver ( ) { if ( ! $ this -> callbackResolver instanceof CallbackResolverInterface ) { $ this -> callbackResolver = new CallbackResolver ( $ this ) ; } return $ this -> callbackResolver ; }
Get callable resolver

@return CallbackResolverInterface|null
Get callable resolver