code: def list_campaigns(options={})
        response = connection.get do |req|
          req.url "campaigns/list", options
        end
          return_error_or_body(response, response.body.response.campaigns.items)
      end
docs: Get a list of campaigns
   Details on param options can be found at https://developer.foursquare.com/docs/campaigns/list
  
   @param [Hash]  options
   @option options String :specialId - if specified, limits response to campaigns involving the given special
   @option options String :groupId - if specified, limits response to campaigns involving the given group
   @option options String :status - which campaigns to return: pending,scheduled,active,expired,depleted,stopped,notStarted,ended,all (default=all)