code: function(options) {
    if (!(this instanceof Request)) {
      return new Request(options);
    }
  
    var defaults = {
      // method: String
      // url: String
      // headers: Object
      // params: Object
      // data: Object
  
      method: 'GET'
    };
  
    this.config = util.extend(defaults, options || {});
    return this;
  }
docs: /* ==========================================================================
  Request - Class for making HTTP requests
  ========================================================================== 
  helper class for building HTTP requests
  @returns {Request}
  @constructor