old_contents: var Tags = require('./tags')
  
  module.exports = function (options) {
    var docker = require('../src/docker.js')(options)
    var tagImpl = Tags(docker)
    return {
      build: docker.build,
      info: docker.info,
      login: docker.login,
      push: docker.push,
      pushTags: tagImpl.pushTags,
      removeImage: docker.removeImage,
      tag: docker.tag,
      tagImage: tagImpl.tagImage,
      version: docker.version
    }
  }
  
new_contents: var Tags = require('./tags')
  
  module.exports = function (options) {
    var docker = require('../src/docker.js')(options)
    var tagImpl = Tags(docker)
    return {
      build: docker.build,
      info: docker.info,
      login: docker.login,
      pull: docker.pull,
      push: docker.push,
      pushTags: tagImpl.pushTags,
      removeImage: docker.removeImage,
      tag: docker.tag,
      tagImage: tagImpl.tagImage,
      version: docker.version
    }
  }
  
subject: add missing method to index so pull is accessible via library API