message: Prevent SearchFilter.callback from being null
diff: @@ -35,7 +35,7 @@ declare class SearchFilter {
  /**
  * A callback function to trigger when the tab is changed
  */
  - callback: (event: KeyboardEvent, query: string, content: string) => void | null;
  + callback: (event: KeyboardEvent, query: string, content: string) => void;
  /**
  * The CSS selector used to target the tab navigation element
  