code: func (entry *UtxoEntry) Clone() *UtxoEntry {
  	if entry == nil {
  		return nil
  	}
  
  	return &UtxoEntry{
  		amount:      entry.amount,
  		pkScript:    entry.pkScript,
  		blockHeight: entry.blockHeight,
  		packedFlags: entry.packedFlags,
  	}
  }
docs: // Clone returns a shallow copy of the utxo entry.