*/
public function getUndoContent( $current, $undo, $undoafter, $undoIsLatest = false ) {
Assert::parameterType( Revision::class . '|' . Content::class, $current, '$current' );
*/
public function getUndoContent( $current, $undo, $undoafter, $undoIsLatest = false ) {
Assert::parameterType( Revision::class . '|' . Content::class, $current, '$current' );