Flutter, Flutter App Development, Data Structures, Algorithms.
queue.add(friend.id); } } return false; } } final friendsGraph = FriendsGraph(users: { alice.id: alice, bob.id: bob, charlie.id: charlie, david.id: david, erin.id: erin, }); class FriendStatusWidget extends StatelessWidget { final int userId1; final int userId2; const FriendStatusWidget({required