Java: TestNG: Instant DataProvider Object[][]

Example of creating a DataProvider with simple data object : Object[][]

sometimes

package util;
 
import org.testng.ITest;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
 
import java.lang.reflect.Method;
 
public class DataProviderChangeName implements ITest {
 
   private ThreadLocal<String> testName = new ThreadLocal<>();
 
   @DataProvider(name = "role")
   public static Object[][] roles() {
       return new Object[][] {{"Developer"},{"Team Lead"},{"QA"},{"Business Analyst"},{"DevOps Eng"},{"PMO"} };
   }
 
   // 1. Verify create staff invitations (Doctor) with valid authToken and parameters (Positive scenario)
   @Test(dataProvider = "role")
   public void createUser(String role) {
 
   }
 
   @BeforeMethod
   public void BeforeMethod(Method method, Object[] testData){
       testName.set(method.getName() + "_" + testData[0]);
   }
 
   @Override
   public String getTestName() {
       return testName.get();
   }