buffering

type HeaderAwareCsvReader interface {
	csvutil.Reader
	Header() ([]string, error)
}

type HeaderAwareCsvReaderOptions struct {
	// Header
	// if none specified: first line is header, second and later lines are data
	// If one or more are specified: all after the first line is data
	Header []string
	// HeaderAliases
	// Convert values obtained as headers (either explicitly in Header or from the first line of encoding/csv.Reader) before they are actually processed by csvutil's CSV decoder.
	HeaderAliases map[string]string
}