code: public OvhInstanceGroup project_serviceName_instance_group_groupId_GET(String serviceName, String groupId, String region) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/instance/group/{groupId}";
  		StringBuilder sb = path(qPath, serviceName, groupId);
  		query(sb, "region", region);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, OvhInstanceGroup.class);
  	}
docs: Get all groups
  
  REST: GET /cloud/project/{serviceName}/instance/group/{groupId}
  @param groupId [required] Instance group id
  @param region [required] Instance region
  @param serviceName [required] Project id