| ### MDCProgressView | |
| #### -accessibilityValue | |
| Like UIProgressView, MDCProgressView's `accessibilityValue` is based on the current value of the ProgressView's | |
| `progress` property. Also like UIProgressView, this `accessibilityValue` takes the form of a whole number | |
| percentage. To ensure the same behavior between the two classes, the MDCProgressView class has a static | |
| UIProgressView that instances query for its `accessibilityValue` whenever they need to provide their own. | |
| The ProgressView announces a new `accessibilityValue` whenever its `progress` changes if VoiceOver is on. |