function prepareLocalExamples(done) {
  const folders = getExampleFolders();
  return gulp.parallel(
    folders.map(function (folder) {
      return function preDeployExample(done) {
        return prepareExample(folder, true, done);
      };
    }),
    prepareDeveloperTools,
  )(done);
}
Prepare examples/demos for local testing of the GitHub Pages site.
@param {Function} done Completed callback.
@returns {Function} Gulp task.