The Gtk.Table allow the programmer to arrange widgets in rows and
columns, making it easy to align many widgets next to each other,
horizontally and vertically.
GTK.Table(2,2,0)->attach_defaults( GTK.Label("0,0"), 0, 1, 0, 1)->attach_defaults( GTK.Label("0,1"), 0, 1, 1, 2)->attach_defaults( GTK.Label("1,0"), 1, 2, 0, 1)->attach_defaults( GTK.Label("1,1"), 1, 2, 1, 2)->set_col_spacings(10)->set_row_spacings(10)
GTK.Table(2,2,0)->attach_defaults( GTK.Label("0,0-1,0"), 0, 2, 0, 1)->attach_defaults( GTK.Label("0,1"), 0, 1, 1, 2)->attach_defaults( GTK.Label("1,1"), 1, 2, 1, 2)->set_col_spacings(10)->set_row_spacings(10)