code: public void marshall(DescribedUser describedUser, ProtocolMarshaller protocolMarshaller) {
  
          if (describedUser == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(describedUser.getArn(), ARN_BINDING);
              protocolMarshaller.marshall(describedUser.getHomeDirectory(), HOMEDIRECTORY_BINDING);
              protocolMarshaller.marshall(describedUser.getPolicy(), POLICY_BINDING);
              protocolMarshaller.marshall(describedUser.getRole(), ROLE_BINDING);
              protocolMarshaller.marshall(describedUser.getSshPublicKeys(), SSHPUBLICKEYS_BINDING);
              protocolMarshaller.marshall(describedUser.getTags(), TAGS_BINDING);
              protocolMarshaller.marshall(describedUser.getUserName(), USERNAME_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.