code: public OvhTask serviceName_changeOs_POST(String serviceName, OvhDirectAdminOsEnum os) throws IOException {
  		String qPath = "/license/directadmin/{serviceName}/changeOs";
  		StringBuilder sb = path(qPath, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "os", os);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhTask.class);
  	}
docs: Change the Operating System for a license
  
  REST: POST /license/directadmin/{serviceName}/changeOs
  @param os [required] The operating system you want for this license
  @param serviceName [required] The name of your DirectAdmin license