code: function EnvLookupError (e) {
  
      e = e || {};
  
      var code = e.code || ERR_UNKNOWN;
      var hostname = e.hostname || '';
  
      this.message = e.message || 'Environment lookup failed: ' + code;
      this.code = code;
      this.hostname = hostname;
  
  }
docs: /* EnvLookupError