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< void regProbePoints() M5_ATTR_OVERRIDE;
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> void regProbePoints() override;
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< void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
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> void serialize(CheckpointOut &cp) const override;
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< void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
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> void unserialize(CheckpointIn &cp) override;