code: function DockerProc(docker, config) {
    EventEmitter.call(this);
  
    this.docker = docker;
    this._createConfig = config.create;
    this._startConfig = config.start;
  
    this.stdout = new streams.PassThrough();
    this.stderr = new streams.PassThrough();
  }
docs: Loosely modeled on node's own child_process object thought the interface to get
  the child process is different.