    # File lib/fog/aws/requests/rds/describe_db_snapshots.rb, line 37
            def describe_db_snapshots(opts={})
              response = Excon::Response.new
              snapshots = self.data[:snapshots].values
              if opts[:identifier]
                snapshots = snapshots.select{|snapshot| snapshot['DBInstanceIdentifier'] == opts[:identifier]}
              end

              if opts[:snapshot_id]
                snapshots = snapshots.select{|snapshot| snapshot['DBSnapshotIdentifier'] == opts[:snapshot_id]}
                raise Fog::AWS::RDS::NotFound.new("DBSnapshot #{opts[:snapshot_id]} not found") if snapshots.empty?
              end

              snapshots.each do |snapshot|
                case snapshot['Status']
                when 'creating'
                  if Time.now - snapshot['SnapshotCreateTime'] > Fog::Mock.delay
                    snapshot['Status'] = 'available'
                  end
                end
              end

              # Build response
              response.status = 200
              response.body = {
                "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id },
                "DescribeDBSnapshotsResult" => { "DBSnapshots" => snapshots }
              }
              response

            end