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Specifies the status of an outline (range group).
example
//The following example specifies to display a range group as collapsed.
sheet.rowOutlines.group(0,5);
var rgi = sheet.rowOutlines.find(1, 0);
rgi.state(GC.Spread.Sheets.Outlines.OutlineState.collapsed);
spread.invalidateLayout();
spread.repaint();
• collapsed = 1
Indicates collapsed status with the plus sign.
• expanded = 0
Indicates expanded status with the minus sign.