pub unsafe extern "C" fn rocksdb_backup_engine_options_set_env(
options: *mut rocksdb_backup_engine_options_t,
env: *mut rocksdb_env_t,
)
pub unsafe extern "C" fn rocksdb_backup_engine_options_set_env(
options: *mut rocksdb_backup_engine_options_t,
env: *mut rocksdb_env_t,
)