> The issue at-hand is what is not explicitly documented. What constitutes a guard-worthy function? https://hexdocs.pm/elixir/1.15/patterns-and-guards.html#gua

> The issue at-hand is what is not explicitly documented. What constitutes a guard-worthy function? https://hexdocs.pm/elixir/1.15/patterns-and-guards.html#guards https://hexdocs.pm/elixir/1.15/patterns-and-guards.html#guar... Plus the docs lists on the sidebar which custom functions are guards. Examples: https://hexdocs.pm/elixir/1.15/Integer.html#guards https://hexdocs.pm/elixir/1.15/Integer.html#guards