Note that this is contrary to the convention used in the Erlang community, where the number is used to disambiguate function definitions with different paramete

Note that this is contrary to the convention used in the Erlang community, where the number is used to disambiguate function definitions with different parameter counts, e.g. in https://www.erlang.org/docs/18/man/supervisor.html https://www.erlang.org/docs/18/man/supervisor.html we see definitions of `start_link/2` and `start_link/3`. It is a stylistic convention to always add this number to any reference to a function, even if there is only one definition.