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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def initialize(self, initialization_order=None):
 """ This function tries to initialize the stateful objects. In the case where an initialization function for `Stock A` depends on the value of `Stock B`, if we try to initialize `Stock A` before `Stock B` then we will get an error, as the value will not yet exist. In this case, just skip initializing `Stock A` for now, and go on to the other state initializations. Then come back to it and try again. """


        # Initialize time
        if self.time is None:
            if self.time_initialization is None:
                self.time = Time()
            else:
                self.time = self.time_initialization()

        # if self.time is None:
        #     self.time = time
        # self.components.time = self.time
        # self.components.functions.time = self.time  # rewrite functions so we don't need this
        self.components._init_outer_references({
            'scope': self,
            'time': self.time
        })

        remaining = set(self._stateful_elements)

        while remaining:
            progress = set()
            for element in remaining:
                try:
                    element.initialize()
                    progress.add(element)
                except (KeyError, TypeError, AttributeError):
                    pass

            if progress:
                remaining.difference_update(progress)
            else:
                raise KeyError('Unresolvable Reference: Probable circular initialization' +
                               '\n'.join([repr(e) for e in remaining]))