code: public void marshall(ModifyReplicationInstanceRequest modifyReplicationInstanceRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (modifyReplicationInstanceRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getReplicationInstanceArn(), REPLICATIONINSTANCEARN_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getAllocatedStorage(), ALLOCATEDSTORAGE_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getApplyImmediately(), APPLYIMMEDIATELY_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getReplicationInstanceClass(), REPLICATIONINSTANCECLASS_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getVpcSecurityGroupIds(), VPCSECURITYGROUPIDS_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getPreferredMaintenanceWindow(), PREFERREDMAINTENANCEWINDOW_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getMultiAZ(), MULTIAZ_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getEngineVersion(), ENGINEVERSION_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getAllowMajorVersionUpgrade(), ALLOWMAJORVERSIONUPGRADE_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getAutoMinorVersionUpgrade(), AUTOMINORVERSIONUPGRADE_BINDING);
              protocolMarshaller.marshall(modifyReplicationInstanceRequest.getReplicationInstanceIdentifier(), REPLICATIONINSTANCEIDENTIFIER_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.