func (p *SettableStruct) Set(v int) { p.SettableField = v }

type SettablePointer struct {
	SettableField *int
}

func (p *SettablePointer) Set(v int) { *p.SettableField = v }

func TestStructOfWithInterface(t *testing.T) {
	const want = 42
	type Iface interface {
		Get() int
	}
	type IfaceSet interface {
		Set(int)
	}
	tests := []struct {
		name string
		typ  Type