const P = require('pco');

const f = P.co(function* () {
  yield P.delay(2000);
  return 10;
});

f().then(console.log);

const { P, co } = require('pco');

const f = co(function* () {
  yield P.delay(2000);
  return 'pco';
});

f().then(console.log);