code: function analyze (fileSourceData) {
      var analysis = new Analysis();
          
      for (let sample of fileSourceData) {
          if (saysHelloWorld(sample.text)) {
              analysis.addError({
                  line: sample.line,
                  message: 'At least try to look like you didn\'t copy the demo code!'
              });
          }
      }
  
      return analysis;
  }
docs: Analyze file source data for the case-insensitive phrase "Hello world".
  
  @param {FileSourceData} fileSourceData - The file source data to analyze.
  @returns {Analysis} - The analysis of the file source data.