code: def hybridize(self, active=True, **kwargs):
          
          if self._children and all(isinstance(c, HybridBlock) for c in self._children.values()):
              warnings.warn(
                  "All children of this Sequential layer '%s' are HybridBlocks. Consider "
                  "using HybridSequential for the best performance."%self.prefix, stacklevel=2)
          super(Sequential, self).hybridize(active, **kwargs)
docs: Activates or deactivates `HybridBlock` s recursively. Has no effect on
          non-hybrid children.
  
          Parameters
          ----------
          active : bool, default True
              Whether to turn hybrid on or off.
          **kwargs : string
              Additional flags for hybridized operator.