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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 _populate_issue_and_traces(self, graph: TraceGraph, instance_id: int) -> None: """ Copies an issue over from the given trace graph, including all its traces and assocs. """

        self._populate_issue(graph, instance_id)
        self._populate_issue_trace(graph, instance_id)