* @return true if block group has superblock*/
bool ext4_sb_is_super_in_bg(struct ext4_sblock *s, uint32_t block_group);
+/**@brief TODO:*/
+bool ext4_sb_sparse(uint32_t group);
+
/**@brief TODO:*/
uint32_t ext4_bg_num_gdb(struct ext4_sblock *s, uint32_t group);