code: public void project_serviceName_instance_instanceId_PUT(String serviceName, String instanceId, String instanceName) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/instance/{instanceId}";
  		StringBuilder sb = path(qPath, serviceName, instanceId);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "instanceName", instanceName);
  		exec(qPath, "PUT", sb.toString(), o);
  	}
docs: Alter an instance
  
  REST: PUT /cloud/project/{serviceName}/instance/{instanceId}
  @param instanceId [required] Instance id
  @param instanceName [required] Instance new name
  @param serviceName [required] Service name