def fetch_result_from_cache(cache_key, cache_options = {}, &block)
      expanded_cache_key = ActiveSupport::Cache.expand_cache_key(cache_key, :rabl)
      Rabl.configuration.cache_engine.fetch(expanded_cache_key, cache_options, &block)
    end
def fetch_result_from_cache(cache_key, cache_options = {}, &block)
      expanded_cache_key = ActiveSupport::Cache.expand_cache_key(cache_key, :rabl)
      Rabl.configuration.cache_engine.fetch(expanded_cache_key, cache_options, &block)
    end
Fetches a key from the cache and stores rabl template result otherwise
 fetch_from_cache('some_key') { ...rabl template result... }