code: function(filePath, baseURL, System) {
        // Convert file paths to module name by stripping the baseURL and the ".js" extension
        if (System.defaultJSExtensions) {
          filePath = filePath.replace(/\.js$/, '');
        }
        return filePath
          .replace(new RegExp('^' + baseURL.replace('/', '\/')), '');
      }
docs: Takes a file path and the baseURL and returns the module name
  to pass to System.import()
  @param filePath {string}
  @param baseURL {string}
  @param System {object}
  @returns {string}