UIPeripheralHostView

This view contains the iOS keyboard. It is made up of the background (UIKBInputBackdropView) and the foreground (UIKeyboardAutomatic)

recursiveDefinition example on 7.1.2:

<UIPeripheralHostView: frame = (0 568; 320 252);>
   | <UIKBInputBackdropView: frame = (0 0; 320 252);>
   |    | <UIKBBackdropView: frame = (0 0; 320 252);>
   |    |    | <_UIBackdropEffectView: frame = (0 0; 320 252);>
   | <UIKeyboardAutomatic: frame = (0 0; 320 252);>