}
	m, ok := v.Interface().(Marshaler)
	if !ok {
		e.WriteString("null")
		return
	}
	b, err := m.MarshalJSON()
	if err == nil {
		e.Grow(len(b))
		out := e.AvailableBuffer()
		out, err = appendCompact(out, b, opts.escapeHTML)
		e.Buffer.Write(out)
	}
	if err != nil {
		e.error(&MarshalerError{v.Type(), err, "MarshalJSON"})
	}
}