fetch_multi

# File activesupport/lib/active_support/cache/strategy/local_cache.rb, line 111
        def fetch_multi(*names, &block) # :nodoc:
          return super if local_cache.nil? || names.empty?

          options = names.extract_options!
          options = merged_options(options)

          keys_to_names = names.index_by { |name| normalize_key(name, options) }

          local_entries = local_cache.read_multi_entries(keys_to_names.keys)
          results = local_entries.each_with_object({}) do |(key, value), result|
            # If we recorded a miss in the local cache, `#fetch_multi` will forward
            # that key to the real store, and the entry will be replaced
            # local_cache.delete_entry(key)
            next if value.nil?

            entry = deserialize_entry(value, **options)

            normalized_key = keys_to_names[key]
            if entry.nil?
              result[normalized_key] = nil
            elsif entry.expired? || entry.mismatched?(normalize_version(normalized_key, options))
              local_cache.delete_entry(key)
            else
              result[normalized_key] = entry.value
            end
          end

          if results.size < names.size
            results.merge!(super(*(names - results.keys), options, &block))
          end

          results
        end