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< virtual Port *getPort(const std::string &if_name)
---
> virtual Port *getPort(const std::string &if_name, int idx = -1)
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< virtual Port *getPort(const std::string &if_name)
---
> virtual Port *getPort(const std::string &if_name, int idx = -1)
< virtual Port *getPort(const std::string &if_name)
---
> virtual Port *getPort(const std::string &if_name, int idx = -1)
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< virtual Port *getPort(const std::string &if_name)
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> virtual Port *getPort(const std::string &if_name, int idx = -1)