Function rocksdb_writebatch_iterate_ld 

pub unsafe extern "C" fn rocksdb_writebatch_iterate_ld(
    arg1: *mut rocksdb_writebatch_t,
    state: *mut c_void,
    put: Option<unsafe extern "C" fn(arg1: *mut c_void, k: *const c_char, klen: usize, v: *const c_char, vlen: usize)>,
    deleted: Option<unsafe extern "C" fn(arg1: *mut c_void, k: *const c_char, klen: usize)>,
    log_data: Option<unsafe extern "C" fn(arg1: *mut c_void, blob: *const c_char, blob_len: usize)>,
)