gtk/text_view.go
func (v *TextView) AddChildInWindow(child IWidget, tp TextWindowType, xpos, ypos int) {
	C.gtk_text_view_add_child_in_window(v.native(), child.toWidget(), C.GtkTextWindowType(tp), C.gint(xpos), C.gint(ypos))
}
func (v *TextView) AddChildInWindow(child IWidget, tp TextWindowType, xpos, ypos int) {
	C.gtk_text_view_add_child_in_window(v.native(), child.toWidget(), C.GtkTextWindowType(tp), C.gint(xpos), C.gint(ypos))
}
// AddChildInWindow is a wrapper around gtk_text_view_add_child_in_window().