type Data struct {
	Err   error
	Bytes []byte
}

type Follower struct {
	Data   chan Data      // Data read from the file.
	Ready  chan struct{}  // Closed if everything is set up.
	Reopen chan os.Signal // Send signal to reopen file.

	// Retry opening the file if it disappears for this period; this will
	// attempt to open the file every second.
	//
	// Default is 2s; set to -1 to retry forever.
	Retry time.Duration
	// contains filtered or unexported fields
}