def retrieve_calendar
      response = send_calendar_request("/#{@id}", :get)
      @raw = JSON.parse(response.body)
      instance_variable_set(:@summary, @raw['summary'])
      instance_variable_set(:@location, @raw['location'])
      instance_variable_set(:@description, @raw['description'])
      instance_variable_set(:@time_zone, @raw['timeZone'])
      @html_link = @raw['htmlLink']

      self
    end
def retrieve_calendar
      response = send_calendar_request("/#{@id}", :get)
      @raw = JSON.parse(response.body)
      instance_variable_set(:@summary, @raw['summary'])
      instance_variable_set(:@location, @raw['location'])
      instance_variable_set(:@description, @raw['description'])
      instance_variable_set(:@time_zone, @raw['timeZone'])
      @html_link = @raw['htmlLink']

      self
    end
Get an existing calender.
  Returns:
   the calendar that was requested.