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