Class DynamicModuleLoader<S>

  import { DynamicModuleLoader } from '@21epub/dynamic-loader'

  const loaders = [
      {
         modules: ["module1", "module2"],
         loader: async () => {
               await import('url/to/module1');
               await import('url/to/module2')
         }
      },
      {
         modules: 'module3',
         loader: async () => {
               await import('url/to/module3');
         }
      }
  ]

  const dynamicLoader = new DynamicModuleLoader(loaders)

  dynamicLoader.register(['module4'], async () => {
      await import('url/to/module4')
  })

  dynamicLoader.loadAll().then( callbacks =>  console.log(callbacks))

  dynamicLoader.load(['module1','module2']).then(callbacks => console.log(callbacks ))