gtk/tree_view.go
func (v *TreeView) SetHoverExpand(b bool) {
	C.gtk_tree_view_set_hover_expand(v.native(), gbool(b))
}
func (v *TreeView) SetHoverExpand(b bool) {
	C.gtk_tree_view_set_hover_expand(v.native(), gbool(b))
}
// SetHoverExpand is a wrapper around gtk_tree_view_set_hover_expand().