Currently I am doing sth like this:

declare type Resource = { dispose: () => void }
declare function getResource(): Promise<Resource>
async function withResource<T>(executor: (r: Resource) => T) {
  const r = await getResource()
  try {
    return await executor(r)
  } finally {
    r.dispose()
  }
}
...
withResource(async r => {
  // code goes here
})

Is there a better way to achieve this behavior ?