code: func (of *OVAFile) Find(filename string) (*tar.Header, error) {
  	for {
  		header, err := of.tarFile.Next()
  		if err == io.EOF {
  			return nil, err
  		}
  		if header.Name == filename {
  			return header, nil
  		}
  	}
  }
docs: // Find looks for a filename match in the OVA file