Kindly
constructor(background: String? = null, buttonBackground: String? = null, buttonText: String? = null, headerBackground: String? = null, headerText: String? = null, inputBackground: String? = null, inputText: String? = null, userMessageBackground: String? = null, userMessageTextColor: String? = null, botMessageBackground: String? = null, botMessageTextColor: String? = null)