Defines the available button colors

• Primary: used to get users main focus
• Secondary: used as an accent to Primary
• Warn: used to indicate a destructive and/or dangerous action

Defines the emphasis of the button

Defins the content of the button

Returns a view of a button This should be used whenever possible. You can use customView if you need to customize the button.

Returns a custom view of a button. Only use this when view is not enough.