code: def _construct(self, context):
      
      with self.g.as_default():
        if self._pass_through:
          # pylint: disable=protected-access
          return self._pass_through._construct(context)
        current_value = context.get(self, None)
        assert current_value is not _unspecified, 'Circular dependency'
        if current_value is not None:
          return current_value
        context[self] = _unspecified
        method_args = self._replace_deferred(self._method_args, context)
        method_kwargs = self._replace_deferred(self._method_kwargs, context)
        result = self._method(*method_args, **method_kwargs)
        _strip_unnecessary_contents_from_stack(result, set())
  
        context[self] = result
        return result
docs: Constructs this by calling the deferred method.
  
      This assumes that all unbound_vars have been specified in context and if
      this layer has already been computed in this context, then the previously
      constructed value will be returned.
  
      Args:
        context: A dict of UnboundVariables/_DeferredLayers to their values.
      Returns:
        The result of calling the given method on this layer.