An enum that specifies the style for Image.
BORDERLESS is the default; it renders a simple image button with no border.
FILLED buttons have a background color you can set with Image.
To call an enum, you call its parent class, name, and property. For example, 
CardService.ImageButtonStyle.BORDERLESS.
Properties
| Property | Type | Description | 
|---|---|---|
| BORDERLESS | Enum | Image button with no border. Default. | 
| OUTLINED | Enum | Image button with clear background. | 
| FILLED | Enum | Image button with colored background. | 
| FILLED_TONAL | Enum | Image button with an alternative middle ground between filled and outlined buttons. |