| Button.OnConfigureListener | Completion listener for configure(Context, String, OnConfigureListener). |
| OnUrlOpenedListener | Completion listener for when a URL has been opened via
openURL(String, String, String, OnUrlOpenedListener)
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| Button | Main entry point to the Button SDK. |
| DropinButton | This is the default UI class that you will have to drop into your layout XML to display a Button. |
| InteractiveButton | The InteractiveButton is an alternative to DropinButton and will give the user a swipable
list of top-level options to choose from for a direct link into the commerce application. |
| Button.InvalidAppIdException | Exception class when an Application id is invalid. |