Gtk.PaperSize.prototype.set_size

function set_size(width:Number, height:Number, unit:Gtk.Unit):void {
    // Gjs wrapper for gtk_paper_size_set_size()
}

Changes the dimensions of a size to width x height.

Since 2.10

width

the new width in units of unit

height

the new height in units of unit

unit

the unit for width and height