Using detail disclosure buttons on section headers

1. What is disclosure button?
2. What is a disclosure indicator?

What is disclosure button?

A disclosure is a button that controls the visibility of a panel of content. When the content inside the panel is hidden, it is often styled as a typical push button with a right-pointing arrow or triangle to hint that activating the button will display additional content.

What is a disclosure indicator?

A Disclosure Indicator is a special Accessory on a Cell that has an arrow pointing to the right, normally indicating you can navigate another level deep.