code: function HttpError (code, error, description) {
      this.statusCode = code;
  
      if (error instanceof Error)
          WError.call(this, error, description || httpErrors[this.statusCode].description);
      else
          WError.call(this, error || httpErrors[this.statusCode].description);
  
      return this;
  }
docs: @private
  @constructor
  @name HttpError
  @augments WError
  
  @param {Number} code
  
  @returns {HttpError}