Returns the [class@Gutter] object associated with @window_type for @view.
Only %GTK_TEXT_WINDOW_LEFT and %GTK_TEXT_WINDOW_RIGHT are supported,
respectively corresponding to the left and right gutter. The line numbers
and mark category icons are rendered in the left gutter.
Returns the [class@Gutter] object associated with @window_type for @view.
Only %GTK_TEXT_WINDOW_LEFT and %GTK_TEXT_WINDOW_RIGHT are supported, respectively corresponding to the left and right gutter. The line numbers and mark category icons are rendered in the left gutter.