var encoding/json.marshalerType

4 uses

	encoding/json (current package)
		encode.go#L411: 	marshalerType     = reflect.TypeOf((*Marshaler)(nil)).Elem()
		encode.go#L422: 	if t.Kind() != reflect.Ptr && allowAddr && reflect.PtrTo(t).Implements(marshalerType) {
		encode.go#L425: 	if t.Implements(marshalerType) {
		encode.go#L896: 		if !p.Implements(marshalerType) && !p.Implements(textMarshalerType) {