code: def get_all(self, search_filter=None):
          
          items = self.backend.get_all()
  
          if not items:
              if self.version == 1:
                  return {self.namespace: []}
              return []
  
          if search_filter:
              items = jmespath.search(search_filter, items)
  
          return items
docs: Fetch all data from backend.