https://www.rfc-editor.org/rfc/rfc8596.html
RFC 8596: MPLS Transport Encapsulation for the Service Function Chaining (SFC) Network Service...
for the servicefunction chainingrfcmplstransport
https://www.learncpp.com/cpp-tutorial/the-hidden-this-pointer-and-member-function-chaining/
15.1 — The hidden “this” pointer and member function chaining – Learn C++
the hiddenfunction chainingpointermemberlearn
https://www.stefanjudis.com/today-i-learned/optional-chaining-helps-to-avoid-undefined-is-not-a-function-exceptions/
Optional chaining helps to avoid "undefined is not a function" exceptions | Stefan Judis Web...
Jun 26, 2021 - The optional chaining proposal also includes a way to optional execute function that may not be defined without throwing an exception
optional chaining
https://datatracker.ietf.org/doc/html/rfc9015
RFC 9015 - BGP Control Plane for the Network Service Header in Service Function Chaining
BGP Control Plane for the Network Service Header in Service Function Chaining (RFC 9015, )
for the networkcontrol plane