Function librocksdb_sys::rocksdb_transaction_get_for_update

pub unsafe extern "C" fn rocksdb_transaction_get_for_update(
    txn: *mut rocksdb_transaction_t, 
    options: *const rocksdb_readoptions_t, 
    key: *const c_char, 
    klen: usize, 
    vlen: *mut usize, 
    exclusive: c_uchar, 
    errptr: *mut *mut c_char
) -> *mut c_char