    # File lib/fog/aws/requests/elasticache/describe_cache_clusters.rb, line 33
            def describe_cache_clusters(id = nil, options = {})
              response        = Excon::Response.new
              all_clusters    = self.data[:clusters].values.map do |cluster|
                cluster.merge!(options[:show_node_info] ? {
                  'CacheClusterCreateTime'    => DateTime.now - 60,
                  'PreferredAvailabilityZone' => 'us-east-1a'
                } : {})
              end
              if (id != nil) && (all_clusters.empty?)
                raise Fog::AWS::Elasticache::NotFound
              end
              response.body = {
                'CacheClusters'     => all_clusters,
                'ResponseMetadata'  => { 'RequestId' => Fog::AWS::Mock.request_id }
              }
              response
            end