+/**\r
+ This function cancels the token specified by Arg in the Map. This is a callback\r
+ used by Udp4InstanceCancelToken().\r
+\r
+ @param[in] Map Pointer to the NET_MAP.\r
+ @param[in] Item Pointer to the NET_MAP_ITEM.\r
+ @param[in] Arg Pointer to the token to be cancelled, if NULL,\r
+ the token specified by Item is cancelled.\r
+\r
+ @retval EFI_SUCCESS The token is cancelled if Arg is NULL or the token\r
+ is not the same as that in the Item if Arg is not\r
+ NULL.\r
+ @retval EFI_ABORTED Arg is not NULL, and the token specified by Arg is\r
+ cancelled.\r
+\r
+**/\r