code: public ArrayList<OvhRoleTypeEnum> serviceName_node_hostname_role_GET(String serviceName, String hostname) throws IOException {
  		String qPath = "/cluster/hadoop/{serviceName}/node/{hostname}/role";
  		StringBuilder sb = path(qPath, serviceName, hostname);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, t2);
  	}
docs: Roles (ie set of Hadoop services) of the Node
  
  REST: GET /cluster/hadoop/{serviceName}/node/{hostname}/role
  @param serviceName [required] The internal name of your cluster
  @param hostname [required] Hostname of the node