Sets the tabs to use for layout, overriding the default tabs (by default, tabs are every 8 spaces). If tabs is NULL, the default tabs are reinstated. tabs is copied into the layout; you must free your copy of tabs yourself.
a PangoTabArray, or NULL
Sets the tabs to use for layout, overriding the default tabs (by default, tabs are every 8 spaces). If tabs is NULL, the default tabs are reinstated. tabs is copied into the layout; you must free your copy of tabs yourself.