own-caret

Notifies the snip that it is or is not allowed to display the caret (indicating oversnip of keyboard focus) in some display. This method is not caled to request that the caret is actually shown or hidden; the draw method is called for all display requests.

• (send a-snip own-caret own-it?) -> void
      own-it? : boolean

  The own-it? argument is #t if the snip owns the keyboard focus or #f otherwise.