code: public void marshall(CreateRelationalDatabaseRequest createRelationalDatabaseRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (createRelationalDatabaseRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getRelationalDatabaseName(), RELATIONALDATABASENAME_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getAvailabilityZone(), AVAILABILITYZONE_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getRelationalDatabaseBlueprintId(), RELATIONALDATABASEBLUEPRINTID_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getRelationalDatabaseBundleId(), RELATIONALDATABASEBUNDLEID_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getMasterDatabaseName(), MASTERDATABASENAME_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getMasterUsername(), MASTERUSERNAME_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getMasterUserPassword(), MASTERUSERPASSWORD_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getPreferredBackupWindow(), PREFERREDBACKUPWINDOW_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getPreferredMaintenanceWindow(), PREFERREDMAINTENANCEWINDOW_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getPubliclyAccessible(), PUBLICLYACCESSIBLE_BINDING);
              protocolMarshaller.marshall(createRelationalDatabaseRequest.getTags(), TAGS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.