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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 join(self, other, **kwargs):
 """Joins a list or two objects together. Args: other: The other object(s) to join on. Returns: Joined objects. """

        if not isinstance(other, list):
            other = [other]
        return self._join_list_of_managers(other, **kwargs)