public DockPage play() throws Exception {
playButton.waitForElement();
assertThis("Play button is missing or xpath has changed", playButton.isElementPresent());
playButton.click();
return new DockPage(driver);
}
// ********************** Main functionality **************************
public RegisterPage signUp() throws Exception {
signUpButton.waitForElement();
assertThis("Sign UP button is absent on Home page", signUpButton.isElementPresent());
signUpButton.click();
return new RegisterPage(driver);
}