text: // Licensed to Elasticsearch B.V. under one or more contributor
  // license agreements. See the NOTICE file distributed with
  // this work for additional information regarding copyright
  // ownership. Elasticsearch B.V. licenses this file to you under
  // the Apache License, Version 2.0 (the "License"); you may
  // not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //    http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  'use strict'
  
  const winston = require('winston')
  const ecsFormat = require('../') // @elastic/ecs-winston-format
  
  const logger = winston.createLogger({
    level: 'info',
    format: ecsFormat(),
    transports: [
      new winston.transports.Console()
    ]
  })
  
  const myErr = new Error('boom')
  logger.info('oops', { err: myErr })
  