How to figure out the proper variable type of fx a selenium webdriver method?

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class SecondTestCase {
    public static void main(String[] args) {

        //Create driver
        WebDriver driver = new ChromeDriver();

        //Go to website
        driver.get("https://demo.opencart.com/");

        //Select websearch box
        WebElement searchBox = driver.findElement(By.name("search"));
        //I know this is WebElement type

        driver.findElement(By.name("search"));
        //But how would I figure that out from this only?
    }
}

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class SecondTestCase {
    public static void main(String[] args) {

        //Create driver
        WebDriver driver = new ChromeDriver();

        //Go to website
        driver.get("https://demo.opencart.com/");

        //Select websearch box
        WebElement searchBox = driver.findElement(By.name("search"));
        //I know this is WebElement type

        driver.findElement(By.name("search"));
        //But how would I figure that out from this only?
    }
}