Behavior-Driven Development with Cucumber in Elixir

Reading the Cucumber official documentation (https://cucumber.io/docs), there does not seem to be an Elixir implementation.
Can someone explain what the documentation means by advising to have a look at microcuke, a “tiny reference implementation” that “can be ported in to a new language in a day or two” in order to implement Cucumber in Elixir?

I am using the hex package white-bread (https://github.com/meadsteve/white-bread) and am wondering why it is not considered a Cucumber implementation?

(white bread author here with a late response). When creating this tool I wasn’t really aware of the cucumber reference implementation. So I largely just wrote a tool that had all the features I needed from cucumber.