GridPaper({Key key, Color color: const Color(0x7FC3E8F3), double interval: 100.0, int divisions: 2, int subDivisions: 5, Widget child })

Creates a widget that draws a rectilinear grid of 1px wide lines.

Source 

GridPaper({
  Key key,
  this.color: const Color(0x7FC3E8F3),
  this.interval: 100.0,
  this.divisions: 2,
  this.subDivisions: 5,
  this.child
}) : super(key: key);