updateFromValue(evt) {
    this.setState({
      filterFrom: evt.target.value
    });
  }
  updateToValue(evt) {
    this.setState({
      filterTo: evt.target.value
    });
  }

isInRange(orderNumber) {
    let isInRange = true;
    if (this.state.filterFrom !== undefined && this.state.filterFrom !== null) {
      isInRange = orderNumber >= this.state.filterFrom;
    }
    if (
      isInRange &&
      this.state.filterTo !== undefined &&
      this.state.filterTo !== null
    ) {
      isInRange = orderNumber <= this.state.filterFrom;
    }
    return isInRange;
  }
  render() {
    return (
      <div>
        {this.state.orders.orders
          .filter(
            order => this.isInRange(order.orderNumber)
          )
          .map(filteredOrder => {
            return <div>{filteredOrder.orderNumber}</div>;
          })}
      </div>
    );