code: def update_lazyevals(self):
          
          if self.lazy_evals is None:
              return
          elif isinstance(self.lazy_evals, LazyEval):
              self.lazy_evals.get_updated()
          else:
              for lz in self.lazy_evals:
                  lz.get_updated()
docs: Update all LazyEvals in self
  
          self.lzy_evals must be set to LazyEval object(s) enough to
          update all owned LazyEval objects.