Written the Test Script in TestNG framework where the Open browser activity is happening in "baseClass" under `@BeforeTest` annotation and the Test Script is written in Test Packages under as `@Test` Annotation. IN the test Script I am extending the Base Class so that my `@beforetest`(opening the browser) will work first and then test case functionality should execute.
But at TestScript I am getting NULLPointerException.
`@BeforeTest` methods are returning the webdriver object and I thought it will work at `@Test` methods but this is failing

Can anyone guide me here how to proceed further?


    public class BaseClass {
    	public WebDriver driver;
    	@BeforeTest
    	public WebDriver openBrowser()
    	{
    		System.setProperty("webdriver.gecko.driver", System.getProperty("user.dir")+"/Drivers/geckodriver.exe");
    		driver = new FirefoxDriver();
    		driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(120));
    		driver.manage().window().maximize();
    		driver.get("https://app.vwo.com/#/analyze/heatmap/129/reports?token=eyJhY2NvdW50X2lkIjo2LCJleHBlc%20mltZW50X2lkIjoxMjksImNyZWF0ZWRfb24iOjE1MDc3ODk0ODcsInR5cGUiOiJjYW1wYWlnbiIsI%20nZlcnNpb24iOjEsImhhc2giOiJiMzlmMTQ4MWE0ZDMyN2Q4MDllNTM1YzVlNWFjOGVlMCJ9");
    		return driver;
    	}


  [1]: https://i.sstatic.net/bZe2F.png