Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/884
Ok, so it looks like it is working for you.
Zeppelin interprets the first line as the interpreter spec (or whatever
they call it). That's why `%functions` failed because it thinks you want to
use an interpreter called 'functions'. If you want to use a magic function
like `%functions` either put that on a second line or make sure to specify
`%stellar` explicitly like so...
```
%stellar
%functions
```---
