src/Service/CacheManager.php
public function isCacheable($namespace)
    {
        if (!$this->cacheOptions->isEnabled()) {
            return false;
        }

        $namespaces = $this->cacheOptions->getNamespaces();
        // user has enabled caching but has not specified namespaces to cache,
        // so we cache all the namespaces
        if (empty($namespaces)) {
            return true;
        }

        // user has enabled caching but has specified certain namespaces to cache,
        // so we cache only the specified namespaces
        return in_array($namespace, $namespaces);
    }
public function isCacheable($namespace)
    {
        if (!$this->cacheOptions->isEnabled()) {
            return false;
        }

        $namespaces = $this->cacheOptions->getNamespaces();
        // user has enabled caching but has not specified namespaces to cache,
        // so we cache all the namespaces
        if (empty($namespaces)) {
            return true;
        }

        // user has enabled caching but has specified certain namespaces to cache,
        // so we cache only the specified namespaces
        return in_array($namespace, $namespaces);
    }
Checks if settings of a namespace can be cached

@param  string $namespace
@return bool