deleteAllRecords(source: string): Observable<any> {
        let self = this;
        console.log("deleteAllRecords:",source);

        return Observable.create((observer: any) => {
            this.open().subscribe((db: any) => {
                let tx = db.transaction(source, "readwrite");
                let store = tx(source);

                let request = store.clear();
                console.log("request:",request);

                tx = (e: any) => {
                    observer.next();
                    db.close();
                    observer.complete();
                };
                db.onerror = (e: any) => {
                    db.close();
                    self.handleError("IndexedDB error: " + e.target.errorCode);
                }
            });
        });
    };

this.produtos = [
      // tslint:disable-next-line:max-line-length
      { 'cst_pis': '7', 'ncm': '48196000', 'origem_mercadoria': null, 'cest': null, 'domain_id': '99c72db39a5c41708478c5390541af9c', 'cfop': '5', 'valor_unitario': '1.99', 'codigo': '3360', 'cst_icms': null, 'descricao': 'CAIXA DE PANETONE P', 'ean': '7898455106513', 'unidade': 'UN', 'id': '00568764d66f4caaabbae663b6ab2b90', 'cst_cofins': '7', 'csosn_icms': '102' }
    ];

  public updateData() {
    this.DataBase = [];
    this.DataBase.push({
      name: 'Produtos',
      // tslint:disable-next-line:max-line-length
      indexes: ['valor_unitario', 'codigo', 'descricao', 'unidade', 'id'],
      seeds: this.produtos
    });

    this.idbService.clear().subscribe(done => {
      this.idbService.create(this.DataBase).subscribe(done => {
        this.databaseCreated = true;
        this.idbService.all('Produtos').subscribe(
          itens => console.log(itens));
      });
    });
  }