func (o *Task) SubProgress(subtask string, size int) *Task {
	return o.w.operation(o.task, subtask, size, false)
}
SubProgress registers and returns a new subtask with progress.
package ui
import (
	"io"
)
type Task struct {
	loggingMixin
	w        *UI
	started  bool
	progress int
	size     int
}
var _ Logger = &Task{}
func (o *Task) SubTask(subtask string) *Task {
	return o.w.operation(o.task, subtask, 0, true)
}