You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: db.go
    path of file: ./repos/cosmos-sdk/store/storage/pebbledb
    
    the code of the file until where you have to start completion: package pebbledb

import (
	"bytes"
	"encoding/binary"
	"errors"
	"fmt"
	"math"
	"slices"

	"github.com/cockroachdb/pebble"

	corestore "cosmossdk.io/core/store"
	"cosmossdk.io/store/v
    
func (db *Database) Iterator(storeKey string, version uint64, start, end []byte) (corestore.Iterator, error) {
	if (start != nil && len(start) == 0) || (end != nil && len(end) == 0) {
		return nil, storeerrors.ErrKeyEmpty
	}

	if start != nil && end != nil && bytes.Compare(start, end) > 0 {
		return nil, storeerrors.ErrStartAfterEnd
	}

	lowerBound := MVCCEncode(prependStoreKey(storeKey, start), 0)

	var upperBound []byte
	if end != nil {
		upperBound = MVCCEncode(prependStoreKey(storeKey, end), 0)
	}

	itr, err := db.storage.NewIter(&pebble.IterOptions{LowerBound: lowerBound, UpperBound: upperBound})
	if err != nil {
		return nil, err
	}

	return newPebbleDBIterator(itr, storePrefix(storeKey), start, end, version, db.earliestVersion, false), nil
}