type UncertainProgressError struct {
	msg string
}

func (err *UncertainProgressError) Error() string {
	return err.msg
}

// NewUncertainProgressError creates an instance of UncertainProgressError type
func NewUncertainProgressError(msg string) *UncertainProgressError {
	return &UncertainProgressError{msg: msg}
}

// IsOperationFinishedError checks if given error is of type that indicates