add method Null safety

GestureArenaEntry add(
  1. int pointer,
  2. GestureArenaMember member
)

Adds a new member to the arena on behalf of this team.

Used by GestureRecognizer subclasses that wish to compete in the arena using this team.

To assign a gesture recognizer to a team, see OneSequenceGestureRecognizer.team.

Implementation

GestureArenaEntry add(int pointer, GestureArenaMember member) {
  final _CombiningGestureArenaMember combiner = _combiners.putIfAbsent(
    pointer,
    () => _CombiningGestureArenaMember(this, pointer),
  );
  return combiner._add(pointer, member);
}