gtk/text_view.go
func (v *TextView) GetVisibleRect() *gdk.Rectangle {
	var rect C.GdkRectangle
	C.gtk_text_view_get_visible_rect(v.native(), &rect)
	return gdk.WrapRectangle(uintptr(unsafe.Pointer(&rect)))
}
func (v *TextView) GetVisibleRect() *gdk.Rectangle {
	var rect C.GdkRectangle
	C.gtk_text_view_get_visible_rect(v.native(), &rect)
	return gdk.WrapRectangle(uintptr(unsafe.Pointer(&rect)))
}
// GetVisibleRect is a wrapper around gtk_text_view_get_visible_rect().