code: function getReactNativeDependencyNames(options) {
    const blacklist = require('react-native/packager/blacklist');
    const ReactPackager = require('react-native/packager/react-packager');
    const rnEntryPoint = require.resolve('react-native');
  
    return ReactPackager.getDependencies({
      blacklistRE: blacklist(false /* don't blacklist any platform */),
      projectRoots: options.projectRoots,
      assetRoots: options.assetRoots,
      transformModulePath: require.resolve('react-native/packager/transformer'),
    }, {
      entryFile: rnEntryPoint,
      dev: true,
      platform: options.platform,
    }).then(dependencies =>
      dependencies.filter(dependency => !dependency.isPolyfill())
    ).then(dependencies =>
      Promise.all(dependencies.map(dependency => dependency.getName()))
    );
  }
docs: Extract all non-polyfill dependency names from the React Native packager.
  
  @param  {Object}          options             Options
  @param  {String}          options.projectRoot The project root path, where `node_modules/` is found
  @param  {String}          options.platform    The platform for which to get dependencies
  @return {Promise<Object>}                     Resolves with a webpack 'externals' configuration object