<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get(self, node_id):
 """Get a note with the given ID. Args: node_id (str):
 The note ID. Returns: gkeepapi.node.TopLevelNode: The Note or None if not found. """

        return \
            self._nodes[_node.Root.ID].get(node_id) or \
            self._nodes[_node.Root.ID].get(self._sid_map.get(node_id))