Function librocksdb_sys::rocksdb_writebatch_wi_get_from_batch

pub unsafe extern "C" fn rocksdb_writebatch_wi_get_from_batch(
    wbwi: *mut rocksdb_writebatch_wi_t, 
    options: *const rocksdb_options_t, 
    key: *const c_char, 
    keylen: usize, 
    vallen: *mut usize, 
    errptr: *mut *mut c_char
) -> *mut c_char