Function init

test/node-test/async_hooks.js:25–29

(asyncId, type, triggerAsyncId, resource)

const hook = createHook({
  init (asyncId, type, triggerAsyncId, resource) {
    if (type === 'TIMERWRAP') return
    // process._rawDebug(type + ' ' + asyncId)
    transactions.set(asyncId, getCurrentTransaction())
  },
  destroy (asyncId) {
    transactions.delete(asyncId)
  }