android - What is the "icon" attribute in <provider> used for? -

I am writing a content provider, it will be part of my application. What does the "icon" feature in the element do?:

Where can anyone see this icon? Is there a way for users to list all the content providers in the system, and they can probably see this list?

It is available in the API, but has not been shown anytime in the UI. Do not supply it; If not supplied, the icon will be similar to icon, so if if is used then you can still make a suitable icon for that component.