onInvitationReceivedFromGroup method Null safety

void onInvitationReceivedFromGroup(
  1. String groupId,
  2. String? groupName,
  3. String inviter,
  4. String? reason
)

id是groupId, 名称是groupName的群邀请被inviter拒绝,理由是reason

Implementation

void onInvitationReceivedFromGroup(
    String groupId, String? groupName, String inviter, String? reason);