public UICustomizationType withCSS(String cSS) {
        setCSS(cSS);
        return this;
    }
<p>
The CSS values in the UI customization.
</p>

@param cSS
       The CSS values in the UI customization.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cognitoidp/src/main/java/com/amazonaws/services/cognitoidp/model/UICustomizationType.java