pub unsafe extern "C" fn rocksdb_backupable_db_options_set_backup_dir(
options: *mut rocksdb_backupable_db_options_t,
backup_dir: *const c_char
)
pub unsafe extern "C" fn rocksdb_backupable_db_options_set_backup_dir(
options: *mut rocksdb_backupable_db_options_t,
backup_dir: *const c_char
)