如何使用图形API检查我是否已经在Facebook上发送了任何朋友请求

facebook graph API中是否有任何方法可以检查我是否已经向用户发送了好友请求?

Is there any method in facebook graph API to check if I already sent a friend request to a user?

类似UserId_1 = 76，UserId_2 = 55

Something like UserId_1 = 76, UserId_2 = 55

已经发送了朋友请求?(user_id = 76)= true

Already_sent_friend_request?(user_id=76) = true

已经发送了朋友请求?(user_id = 55)=假

Already_sent_friend_request?(user_id=55) = false