code: public void marshall(Disk disk, ProtocolMarshaller protocolMarshaller) {
  
          if (disk == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(disk.getName(), NAME_BINDING);
              protocolMarshaller.marshall(disk.getArn(), ARN_BINDING);
              protocolMarshaller.marshall(disk.getSupportCode(), SUPPORTCODE_BINDING);
              protocolMarshaller.marshall(disk.getCreatedAt(), CREATEDAT_BINDING);
              protocolMarshaller.marshall(disk.getLocation(), LOCATION_BINDING);
              protocolMarshaller.marshall(disk.getResourceType(), RESOURCETYPE_BINDING);
              protocolMarshaller.marshall(disk.getTags(), TAGS_BINDING);
              protocolMarshaller.marshall(disk.getSizeInGb(), SIZEINGB_BINDING);
              protocolMarshaller.marshall(disk.getIsSystemDisk(), ISSYSTEMDISK_BINDING);
              protocolMarshaller.marshall(disk.getIops(), IOPS_BINDING);
              protocolMarshaller.marshall(disk.getPath(), PATH_BINDING);
              protocolMarshaller.marshall(disk.getState(), STATE_BINDING);
              protocolMarshaller.marshall(disk.getAttachedTo(), ATTACHEDTO_BINDING);
              protocolMarshaller.marshall(disk.getIsAttached(), ISATTACHED_BINDING);
              protocolMarshaller.marshall(disk.getAttachmentState(), ATTACHMENTSTATE_BINDING);
              protocolMarshaller.marshall(disk.getGbInUse(), GBINUSE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.