fetchData = async (dataURL, dictionaryURL) => {
    let joinedData;
    await fetch(dataURL)
      .then(results => results.json())
      .then(data => {
        joinedData = data;
        joinedData.forEach(element => {
          if (this.state.statusDictionary[element.status] !== undefined)
            element.status = this.state.statusDictionary[element.status];
          else element.status = 'N/A';
          if (this.state.osDictionary[element.os] !== undefined)
            element.os = this.state.osDictionary[element.os];
          else element.os = 'N/A';
        });
      });
    this.setState({ tableData: joinedData });
  };