SelectionChangedHandler typedef

void SelectionChangedHandler (TextSelection selection, RenderEditable renderObject, SelectionChangedCause cause)

Signature for the callback that reports when the user changes the selection (including the cursor location).

Used by RenderEditable.onSelectionChanged.

Implementation 

typedef SelectionChangedHandler = void Function(TextSelection selection, RenderEditable renderObject, SelectionChangedCause cause);