Aws\DocDB- Updated API documentation and added paginators for DescribeCertificates, DescribeDBClusterParameterGroups, DescribeDBClusterParameters, DescribeDBClusterSnapshots and DescribePendingMaintenanceActionsAws\EC2- This release adds support for the T4G instance family to the EC2 ModifyDefaultCreditSpecification and GetDefaultCreditSpecification APIs.Aws\ManagedBlockchain- Introducing support for Hyperledger Fabric 1.4. When using framework version 1.4, the state database may optionally be specified when creating peer nodes (defaults to CouchDB).Aws\SFN- This release of the AWS Step Functions SDK introduces support for AWS X-Ray.Aws\Test- Tweaks test for PartitionEndpointProvider to accomodate changed S3 endpoint.