what is the usage of LoadingOptions program from Module 14

I think I got it. this program is incomplete and you want this to be complete by ourself in such a way that we can use it in other test cases to call different browser. Please correct me if I am wrong.

I have created a function of this class and used it in my test cases to.

PFA function created by me and used same in other test case.

package testCases;

import org.openqa.selenium.PageLoadStrategy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeDriverService;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.edge.EdgeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.ProfilesIni;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.ie.InternetExplorerDriverService;
import org.openqa.selenium.ie.InternetExplorerOptions;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.Test;


public class LoadingOptions {

	@Test
	public WebDriver executeTest(String browser){
		//String browser = "Chrome";// xls, xml
		WebDriver driver = null;
		// script
		if(browser.equals("Mozilla")){
			driver = new FirefoxDriver(loadFirefoxOptions());
		}else if(browser.equals("Chrome")){
			driver = new ChromeDriver(loadChromeOptions());
		}else if(browser.equals("IE")){
			driver = new InternetExplorerDriver(loadInternetExplorerOptions());
		}else if(browser.equals("Edge")){
			driver = new EdgeDriver();
		}
		return driver;
	}
	
	public FirefoxOptions loadFirefoxOptions(){
		System.setProperty(FirefoxDriver.SystemProperty.BROWSER_LOGFILE, "null");
		FirefoxOptions options = new FirefoxOptions();
		options.setPageLoadStrategy(PageLoadStrategy.EAGER);
		ProfilesIni allProf = new ProfilesIni();// all profiles on pc
		FirefoxProfile prof = allProf.getProfile("Mod11");
		prof.setPreference("dom.webnotifications.enabled", false);// turn off
		prof.setAcceptUntrustedCertificates(true);
		prof.setAssumeUntrustedCertificateIssuer(false);
		options.setProfile(prof);
		return options;
	}
	
	public ChromeOptions loadChromeOptions(){
		System.setProperty(ChromeDriverService.CHROME_DRIVER_LOG_PROPERTY, "null");
		System.setProperty(ChromeDriverService.CHROME_DRIVER_SILENT_OUTPUT_PROPERTY, "true");
		ChromeOptions ops = new ChromeOptions();	
		ops.addArguments("--disable-notifications");
        ops.addArguments("disable-infobars");
        ops.addArguments("--start-maximized");
		return ops;
	 
	}

	public InternetExplorerOptions loadInternetExplorerOptions() {
		System.setProperty(InternetExplorerDriverService.IE_DRIVER_LOGLEVEL_PROPERTY,"INFO"); 
		System.setProperty(InternetExplorerDriverService.IE_DRIVER_LOGFILE_PROPERTY, "null");
		DesiredCapabilities cap = new DesiredCapabilities();
		InternetExplorerOptions ieops = new InternetExplorerOptions();
		return ieops;
			
	}
	

}

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package testCases;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.testng.annotations.Test;

public class SalesLogin {
	
 //static	String browser = "Chrome";
	static WebDriver driver;
	
		@Test(dataProviderClass=LogInTestDataProvider.class,dataProvider="Salsman_login_data_provider")
		public void loginSales(String username,String password,String Browser) {
			
			String browser = Browser;
			LoadingOptions loading = new LoadingOptions();
			driver = loading.executeTest(browser);
			
			
			driver.get("url of my application");
			Boolean present = driver.findElement(By.id("userName")).isDisplayed();
			System.out.println(present);
			driver.findElement(By.id("userName")).sendKeys(username); 
			driver.findElement(By.id("password")).sendKeys(password);
			driver.findElement(By.xpath("//button[@class ='btn btn-block btn-lg btn-success']")).click();
		}
		
		
}
	

Yes, you can implement this method

Thank you.