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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 get(cls, issue_id):
 """Returns the class object identified by `issue_id` Args: issue_id (str):
 Unique EC2 Instance ID to load from database Returns: EC2 Instance object if found, else None """

        res = Issue.get(issue_id, IssueType.get(cls.issue_type).issue_type_id)
        return cls(res) if res else None