Unable to identify the element under Shadow root in DOM structure using java, selenium

Hi Ashish,

I am unable to find the element under the Shadow root using selenium locators like cssSelector, i am using Java, selenium  ..... pleae help me asap.

for below html.. i need locator for Preferences 

I got the sample code from google, Its required 3 lines of code, but every element required 3 lines of code  to finde under shaddow root?

Please let me know any alternative solution. 

// 1) Locate the shadow host (an element that owns a shadow root)

WebElement host = driver.findElement(By.cssSelector("my-component"));

// 2) Get its shadow root

SearchContext shadowRoot = host.getShadowRoot();

// 3) Find elements inside using CSS selectors

WebElement innerButton = shadowRoot.findElement(By.cssSelector("button.primary"));

innerButton.click();

Thanks

krishna