analytics.js
function Group(options) {
  this.defaults = Group.defaults;
  this.debug = debug;
  Entity.call(this, options);
}
function Group(options) {
  this.defaults = Group.defaults;
  this.debug = debug;
  Entity.call(this, options);
}
function Group ( options ) { this . defaults = Group . defaults ; this . debug = debug ; Entity . call ( this , options ) ; }
Initialize a new `Group` with `options`.

@param {Object} options
Initialize a new Group with options .