docs: def requests(self, code=None, **kwargs):
          """
          Retrieve open requests. You can also enter a specific service code
          argument.
  
          >>> Three('api.city.gov').requests()
          {'all': {'requests': 'data'}}
          >>> Three('api.city.gov').requests('123')
          {'123': {'requests': 'data'}}
          """
          if code:
              kwargs['service_code'] = code
          data = self.get('requests', **kwargs)
          return data