func (w *metacacheBlockWriter) Close() error {
	w.wg.Wait()
	return w.streamErr
}

type metacacheBlock struct {
	data  []byte
	n     int
	First string `json:"f"`
	Last  string `json:"l"`
	EOS   bool   `json:"eos,omitempty"`
}

func (b metacacheBlock) headerKV() map[string]string {
	json := jsoniter.ConfigCompatibleWithStandardLibrary
	v, err := json.Marshal(b)
	if err != nil {

			return -1, err
		}
		if tmp.First == "" && tmp.Last == "" && tmp.EOS {
			return 0, errFileNotFound
		}
		if tmp.First >= search {
			o.debugln("First >= search", v)
			return i, nil
		}
		if tmp.Last >= search {
			o.debugln("Last >= search", v)
			return i, nil
		}
		if tmp.EOS {
			o.debugln("no match, at EOS", v)
			return -3, io.EOF
		}

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u0f44\u0f0b\u0f51\u0f42":"\u0f58\u0f5a\u0f53\u0f0b\u0f58\u0f7c"},week:{dow:0,doy:6}}),l.defineLocale("br",{months:"Genver_C'hwevrer_Meurzh_Ebrel_Mae_Mezheven_Gouere_Eost_Gwengolo_Here_Du_Kerzu".split("_"),monthsShort:"Gen_C'hwe_Meu_Ebr_Mae_Eve_Gou_Eos_Gwe_Her_Du_Ker".split("_"),weekdays:"Sul_Lun_Meurzh_Merc'her_Yaou_Gwener_Sadorn".split("_"),weekdaysShort:"Sul_Lun_Meu_Mer_Yao_Gwe_Sad".split("_"),weekdaysMin:"Su_Lu_Me_Mer_Ya_Gw_Sa".split("_"),weekdaysParseExact:!0,longDateFormat:{LT:"h[e]mm A",LTS:"h[e]mm:ss...