RefreshProgressIndicator({Key key, double value, Color backgroundColor, Animation<Color> valueColor })

Creates a refresh progress indicator.

Rather than creating a refresh progress indicator directly, consider using a RefreshIndicator together with a Scrollable widget.

Source 

RefreshProgressIndicator({
  Key key,
  double value,
  Color backgroundColor,
  Animation<Color> valueColor
}) : super(
  key: key,
  value: value,
  backgroundColor: backgroundColor,
  valueColor: valueColor
);