code: def get_all(self, type_name, base_fields=None, the_filter=None,
                  nested_fields=None):
          
          fields = self.get_fields(type_name, base_fields, nested_fields)
          the_filter = self.dict_to_filter_string(the_filter)
  
          url = '/api/types/{}/instances'.format(type_name)
  
          resp = self.rest_get(url, fields=fields, filter=the_filter)
          ret = resp
          while resp.has_next_page:
              resp = self.rest_get(url, fields=fields, filter=the_filter,
                                   page=resp.next_page)
              ret.entries.extend(resp.entries)
          return ret
docs: Get the resource by resource id.
  
          :param nested_fields: nested resource fields
          :param base_fields: fields of this resource
          :param the_filter: dictionary of filter like `{'name': 'abc'}`
          :param type_name: Resource type. For example, pool, lun, nasServer.
          :return: List of resource class objects