gtk/text_view.go
func (v *TextView) SetInputPurpose(purpose InputPurpose) {
	C.gtk_text_view_set_input_purpose(v.native(),
		C.GtkInputPurpose(purpose))
}
func (v *TextView) SetInputPurpose(purpose InputPurpose) {
	C.gtk_text_view_set_input_purpose(v.native(),
		C.GtkInputPurpose(purpose))
}
// SetInputPurpose is a wrapper around gtk_text_view_set_input_purpose().