marko/packages/runtime-class/test/render/fixtures/beginAsync/test.js

const { promiseProvider } = require("../../../__util__/async-helpers");

exports.templateData = {
  beginAsync: function (out) {
    var asyncOut = out.beginAsync();
    promiseProvider(1).then(function () {
      asyncOut.write("B");
      asyncOut.end();
    });
  },
};