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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_vlan_assignment_uuid(self):
 """Returns the UUID for the region's vlan assignment on CVX :returns: string containing the region's vlan assignment UUID """

        vlan_uuid_cmd = self.cli_commands['resource-pool']
        if vlan_uuid_cmd:
            return self._run_eos_cmds(commands=vlan_uuid_cmd)[0]
        return None