TestNG project reference file which is inherited by each test case file

TestNG project 

package ExtentReports;

import com.aventstack.extentreports.ExtentReports;
import com.aventstack.extentreports.ExtentTest;
import com.aventstack.extentreports.Status;
import com.aventstack.extentreports.reporter.ExtentSparkReporter;
import com.aventstack.extentreports.reporter.configuration.Theme;
import io.github.bonigarcia.wdm.WebDriverManager;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.Reporter;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class Load_Test {

    public static WebDriver driver;
    public static ExtentReports extent;
    public static ExtentSparkReporter spark;



    @BeforeTest
    public void initialize(){
        extent = new ExtentReports();
        spark = new ExtentSparkReporter("target/Spark/Spark.html");
        spark.config().setReportName("Sample_Report_1");
        spark.config().setDocumentTitle("Insurance Project Us Client ");
        spark.config().setTheme(Theme.DARK);
        spark.config().setEncoding("utf-8");
        extent.attachReporter(spark);
    }
    @Test
    public  void load(){


    }

    @AfterTest
    public void end(){
        extent.flush();
    }

}

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With Warm REGARDS,

En. S. WANKHEDE