References
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#. The P4 Language Consortium, “P4 Portable NIC Architecture (PNA)”, Version 0.5, 2021. 
   [Online]. Available: https://p4.org/p4-spec/docs/PNA.html
#. P4lang, “p4c core.p4”. [Online]. Available: https://github.com/p4lang/p4c/blob/main/p4include/core.p4.
#. P4lang, “pna.p4”, [Online]. Available: https://github.com/p4lang/pna/blob/main/pna.p4
#. P4 Language Tutorial. [Online]. Available: https://tinyurl.com/2p9cen9e