AccessibilityHierarchy.Clear

Description

Resets the hierarchy to an empty state, removing all nodes and the screen reader focus.

Warning: When this hierarchy is the AssistiveSupport.activeHierarchy, this method has a non-trivial cost on the following platforms:

• iOS: Clearing the hierarchy has a high cost that scales with its size. Avoid calling this method frequently in performance-sensitive code.
• macOS: Clearing the hierarchy has a moderate cost that scales with its size. Calling this method frequently can affect performance.

Clearing an inactive hierarchy has no native cost.