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: mvcc_key.go
    path of file: ./repos/cockroach/pkg/storage
    
    the code of the file until where you have to start completion: // Copyright 2022 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed

    
func (k MVCCRangeKey) Validate() (err error) {
	defer func() {
		err = errors.Wrapf(err, "invalid range key %s", k)
	}()

	switch {
	case len(k.StartKey) == 0:
		// We don't allow an empty start key, because we don't allow writing point
		// keys at the empty key. The first valid key is 0x00.
		return errors.Errorf("no start key")
	case len(k.EndKey) == 0:
		return errors.Errorf("no end key")
	case k.Timestamp.IsEmpty():
		return errors.Errorf("no timestamp")
	case k.StartKey.Compare(k.EndKey) >= 0:
		return errors.Errorf("start key %s is at or after end key %s", k.StartKey, k.EndKey)
	default:
		return nil
	}
}