553         let start_cluster: Cluster = match self.bpb.fat_type {  in allocate_cluster()  localVariable
569         let free_cluster: Cluster = match self.get_free_cluster(start_cluster, end_cluster) {  in allocate_cluster()
571             Err(_) if start_cluster.cluster_num > RESERVED_CLUSTERS as u64 => {  in allocate_cluster()
599     pub fn deallocate_cluster_chain(&self, start_cluster: Cluster) -> Result<(), SystemError> {  in deallocate_cluster_chain()
600         let clusters: Vec<Cluster> = self.clusters(start_cluster);  in deallocate_cluster_chain()
736     pub fn clusters(&self, start_cluster: Cluster) -> Vec<Cluster> {  in clusters()
737         return self.cluster_iter(start_cluster).collect();  in clusters()
743     pub fn num_clusters_chain(&self, start_cluster: Cluster) -> u64 {  in num_clusters_chain()
745             .cluster_iter(start_cluster)  in num_clusters_chain()
751     fn cluster_iter(&self, start_cluster: Cluster) -> ClusterIter {  in cluster_iter()
753             current_cluster: Some(start_cluster),  in cluster_iter()
760     pub fn get_cluster_by_relative(&self, start_cluster: Cluster, n: usize) -> Option<Cluster> {  in get_cluster_by_relative()
761         return self.cluster_iter(start_cluster).skip(n).next();  in get_cluster_by_relative()
766     pub fn get_last_cluster(&self, start_cluster: Cluster) -> Option<Cluster> {  in get_last_cluster()
767         return self.cluster_iter(start_cluster).last();  in get_last_cluster()
916         start_cluster: Cluster,  in get_free_cluster()
920         let mut cluster: u64 = start_cluster.cluster_num;  in get_free_cluster()
929                     fat_type.get_fat_bytes_offset(start_cluster, fat_start_sector, bytes_per_sec);  in get_free_cluster()