code: protected function getBuiltRulesFromCache($ruleDeclarations)
      {
          if (!$this->cache instanceof CacheInterface) {
              return false;
          }
  
          return $this->cache->get([$this->cacheKey, $this->ruleConfig, $ruleDeclarations]);
      }
docs: Provides the built URL rules that are associated with the $ruleDeclarations from cache.
  
  @param array $ruleDeclarations the rule declarations. Each array element represents a single rule declaration.
  Please refer to [[rules]] for the acceptable rule formats.
  @return UrlRuleInterface[]|false the rule objects built from the given rule declarations or boolean `false` when
  there are no cache items for this definition exists.
  @since 2.0.14