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GObject
╰── GInitiallyUnowned
╰── FoObject
╰── FoNode
╰── FoArea
╰── FoAreaArea
╰── FoAreaReference
╰── FoAreaViewportReference
╰── FoAreaPage
FoArea *
fo_area_viewport_reference_new (void);
Creates a new FoAreaViewportReference initialized to default value.