pub unsafe extern "C" fn rocksdb_options_set_write_buffer_manager(
opt: *mut rocksdb_options_t,
wbm: *mut rocksdb_write_buffer_manager_t,
)
pub unsafe extern "C" fn rocksdb_options_set_write_buffer_manager(
opt: *mut rocksdb_options_t,
wbm: *mut rocksdb_write_buffer_manager_t,
)